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Effect of prisms on visual acuity,contrast sensitivity and nystagmus in patients with albinism
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作者 Maryam Dashti Abbas Riazi +2 位作者 Majid Ashrafi Saeed Rahmani Seyyed Mehdi Tabatabaei 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第10期1864-1868,共5页
AIM:To investigate the effect of using base-out prisms on nystagmus,visual acuity and contrast sensitivity in patients with albinism.METHODS:In this interventional study,patients with albinism who had nystagmus were e... AIM:To investigate the effect of using base-out prisms on nystagmus,visual acuity and contrast sensitivity in patients with albinism.METHODS:In this interventional study,patients with albinism who had nystagmus were enrolled.A comprehensive eye exam was conducted,which included refraction,assessment of far and near vision acuity,and contrast sensitivity measurements.To check for the nystagmus,a videonystagmography was used.The tests were carried out in three modes:without any correction,with optical correction,and with correction using base-out prisms in three different powers,including 4,6,and 8 prism diopters.RESULTS:Totally 23 patients with average age of 28.65±12.13 were examined.It was found that the use of optical correction and optical correction with prisms resulted in a statistically significant improvement in both far(at least:P<0.006)and near visual acuity(at least:P<0.001 except for prism 8;P<0.02).In addition,contrast sensitivity significantly improved at all low and medium frequencies except for correction with prism 8 in frequency 1.5(at least:P<0.01 except for prism 4,frequency 6;P=0.04).no significant improvement was observed in the evaluation of nystagmus characteristics.CONCLUSION:Optical correction with a prism can improve visual acuity and some spatial frequencies,but failed to improve nystagmus parameters. 展开更多
关键词 nystagmus ALBINISM PRISM
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Characteristics and utility of combined duplex color-coded ultrasonography in the cervical rotational position with head MRI and MRA in the differential diagnosis of apogeotropic direction-changing positional nystagmus 被引量:1
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作者 Tessei Kuruma Mariko Arimoto Yasushi Fujimoto 《Journal of Otology》 CSCD 2023年第2期85-90,共6页
Objective:To determine whether cervical ultrasonography,magnetic resonance imaging(MRI),and magnetic resonance angiography(MRA)are useful in the differential diagnosis of etiology and understanding the pathophysiology... Objective:To determine whether cervical ultrasonography,magnetic resonance imaging(MRI),and magnetic resonance angiography(MRA)are useful in the differential diagnosis of etiology and understanding the pathophysiology in cases of apogeotropic direction-changing positional nystagmus(DCPN).Methods:Thirty patients with apogeotropic DCPN were classified into 11 cases of central disease,seven cases of mixed central and peripheral disease,and 12 cases of peripheral disease by differential diagnosis based on various balance function,neuro-otological,and imaging tests.Cervical ultrasonography using the cervical rotation method and MRI and MRA of the head and neck were performed in most patients with apogeotropic DCPN.We reviewed the presence of abnormal imaging findings according to the disease etiology.Results:Of the 30 patients with apogeotropic DCPN,23 showed vascular abnormalities or central lesions on imaging.Vascular lesions were found in six of the 12 patients with peripheral disease.Cervical ultrasonography with cervical rotation detected blood flow disturbance in the vertebral artery in eight patients in whom the disturbance could not be detected by MRI or MRA of the head and neck.Discussion:We hypothesize that the causative disease of apogeotropic DCPN may be strongly associated with circulatory insufficiency of the vertebrobasilar and carotid arteries,and that impaired blood flow in these vessels may affect peripheral vestibular and central function.In patients with apogeotropic DCPN,examinations of vestibular function,central nervous system symptoms,and brain hemodynamics are valuable for differential diagnosis. 展开更多
关键词 Apogeotropic direction changing positional nystagmus Vertebrobasilar artery Vertebrobasilar insufficiency(VBI) ULTRASONOGRAPHY MRI MRA
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Acute isolated vertigo with vertical up-beating nystagmus: A rare case of nucleus intercalatus of Staderini ischemia
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作者 Francesco Comacchio Giacomo Talenti +1 位作者 Renzo Manara Chiara Briani 《Journal of Otology》 CAS CSCD 2023年第4期246-249,共4页
The role of intercalatus nucleus of Staderini(INS),the most caudal of the perihypoglossal nuclei,is much debated.Last research seems to suggest that this nucleus plays a role as a vertical eyes movements integrator.Th... The role of intercalatus nucleus of Staderini(INS),the most caudal of the perihypoglossal nuclei,is much debated.Last research seems to suggest that this nucleus plays a role as a vertical eyes movements integrator.The few clinical reports present in the literature that describe isolated lesions of the INS have described patients presenting in acute with up-beating vertical spontaneous nystagmus.Isolated acute lesion of INS is,in fact,much rare,and,without other neurological signs,is exceptional.We present a case of acute isolated vertigo with no other neurological signs or symptoms,due to INS ischemia provoked by vertebral artery stenosis.The patient presented with spontaneous vertical up-beating nystagmus that showed at videonystagmographic recording,a clear exponential decay of angular slow-phase velocity,that is considered a typical sign of neural integrator impairment.This case seems to represent a further confirm that INS is part,as a vertical-to-position neural integrator,of the neural circuit controlling the vertical eyes movements. 展开更多
关键词 VERTIGO Up-beating nystagmus Intercalatus nucleus Staderini Vertebral artery occlusion Brainstem ischemia
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视动震颤(Optokinetic Nystagmus)与双眼视功能
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作者 杨东生 《眼科研究》 CSCD 1997年第1期62-64,共3页
视动震颤(OKN)反应与双眼视功能密切相关:1.双眼视功能异常者OKN反应以方向性不对称为特点,其机制可能是OKN传导通路上视皮层双眼细胞发育异常。2.OKN反应的双眼交替与双眼竞争可能受同一神经机制的控制。3.动态... 视动震颤(OKN)反应与双眼视功能密切相关:1.双眼视功能异常者OKN反应以方向性不对称为特点,其机制可能是OKN传导通路上视皮层双眼细胞发育异常。2.OKN反应的双眼交替与双眼竞争可能受同一神经机制的控制。3.动态随机点立体图刺激及双眼融合参与下的OKN反应,是判断双眼视功能的有效方法。4.开环OKN方法由于消除了负反馈作用的影响并可对不同部位视网膜刺激,故有较好的应用前景。 展开更多
关键词 视动震颤 双眼视功能异常 病理学
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Design and Efficacy of Surgery for Horizontal Idiopathic Nystagmus with Abnormal Head Posture and Strabismus 被引量:4
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作者 王平 娄丽萍 宋琳 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2011年第5期678-681,共4页
The design and efficacy of surgery for horizontal idiopathic nystagmus (HIN) with abnormal head posture and strabismus were investigated. Different surgical procedures were selected according to the angle of head tu... The design and efficacy of surgery for horizontal idiopathic nystagmus (HIN) with abnormal head posture and strabismus were investigated. Different surgical procedures were selected according to the angle of head turn in 44 cases of HIN with abnormal head posture and strabismus. For patients with a head turn of 15° or less, the Anderson procedure was used; the yoke muscles were recessed upon slow-phase. For patients with a head turn between 15° and 25°, the surgery was designed as a Kestenbaum 5-4-4-5 procedure. For patients with a head turn of 25° or more, the surgery was designed as a Parks 5-8-6-7 procedure. The surgery to correct the abnormal head posture was performed on the fixating eye while that to correct the deviation was then performed on the non-fixating eye at the same time. The amount of surgery of the horizontal rectus muscles on the nonfixating eye was sum of the angle of head turn and the degree of deviation, which was calculated as follows: recession/resection amount of medial and lateral rectis/2×5=angle of head turn±degree of deviation. The results showed as follows: (1) Visual acuity: the visual acuity in the primary ocular position increased two lines or more in 35 patients, accounting for 79.55%. Nine patients had no or only one-line improvement, accounting for 20.45% of the entire study population; (2) The degree of deviation in the primary ocular position: 37 cases had a normal primary ocular position or the degree of deviation ≤8△ after surgery, accounting for 84.09%. Six patients had a residual degree of deviation of 8△―15△, accounting for 13.64%. One patient had a residual degree of deviation 〉20△, accounting for 2.27% of the patients examined; (3) Abnormal head posture: 34 patients had a normal head posture or a head turn of less than 5°, accounting for 72.27%. Eight patients had a residual head turn of 5°―15°, accounting for 18.18%. Two patients had a head turn of 15°― 25°, accounting for 4.55%. It was concluded that different surgical procedures based on the angle of head turn and the relationship between deviation and null zone can eliminate anomalous head posture, correct deviation, and improve vision acuity in the primary ocular position simultaneously. 展开更多
关键词 horizontal idiopathic nystagmus abnormal head posture and strabismus SURGERY
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Clinical features of strabismus and nystagmus in bilateral congenital cataracts 被引量:2
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作者 Sung Soo Hwang Wan Soo Kim Soo Jung Lee 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2018年第5期813-817,共5页
AIM:To evaluate the prevalence,clinical features,and the factors affecting onset of strabismus and nystagmus in patients with bilateral congenital cataracts.METHODS:This study evaluated 116 eyes of 58 patients who u... AIM:To evaluate the prevalence,clinical features,and the factors affecting onset of strabismus and nystagmus in patients with bilateral congenital cataracts.METHODS:This study evaluated 116 eyes of 58 patients who underwent lens removal for the treatment of bilateral congenital cataracts between January 1999 and January 2011.The presence and type of strabismus and nystagmus were determined before and after surgery.Type of strabismus and final visual acuity were compared in patients with and without nystagmus.Patients were divided into three groups(orthotropia/orthotropia,orthotropia/strabismus,and strabismus/strabismus) according to their preoperative and postoperative ocular alignment.Age at cataract surgery and associations of nystagmus and primary intraocular lens(IOL) implantation with strabismus were analyzed.RESULTS:Six patients(10.3%) had strabismus preoperatively and an additional 11(19.0%) developed postoperative strabismus.Exotropia was more common than esotropia both preoperatively and postoperatively.Eighteen patients(31.0%) had postoperative nystagmus,with sensory nystagmus being the most common type.Of the 18 patients with nystagmus,10 had strabismus,with exotropia being more common than esotropia.Postoperative visual acuity was poor in patients with nystagmus.Age at cataract surgery and rate of primary IOL implantation were significantly lower,and postoperative nystagmus was more common,in the orthotropia/strabismus group than in the other two groups.CONCLUSION:Exotropia and sensory nystagmus are common in patients with bilateral congenital cataracts.Age at cataract surgery and rate of IOL implantation are lowerand nystagmus more common in patients with postoperative onset of strabismus.Nystagmus is associated with poor visual prognosis. 展开更多
关键词 bilateral congenital cataracts STRABISMUS nystagmus
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Spectral-domain optical coherence tomography in patients with congenital nystagmus 被引量:1
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作者 Hong Yang, Jiu-Quan Zhang 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2011年第6期627-630,共4页
AIM: To study macular features in patients with congenital nystagmus and to assess the utility of spectral-domain optical coherence tomography (SD-OCT) in nystagmus. METHODS: The macular areas of 51 outpatients with c... AIM: To study macular features in patients with congenital nystagmus and to assess the utility of spectral-domain optical coherence tomography (SD-OCT) in nystagmus. METHODS: The macular areas of 51 outpatients with congenital nystagmus were examined using SD-OCT. Morphological changes in the retinal layers of the macular area were analysed. RESULTS: Macular images were successfully obtained with SD-OCT from 50 (98%) patients. Patients with ocular albinism mainly have macular hypoplasia, abnormal foveal depression, and increased foveal thickness with persistence of an inner nuclear layer, an inner plexiform layer, a ganglion cell layer and a nerve fiber layer. Macular morphology similar to albinism was observed in three patients with idiopathic macular hypoplasia. The OCT findings of cone dystrophy included unclear, disrupted or invisible photoreceptor outer segment/inner segment in the fovea; fusion, thickening and uneven reflection of the outer segment/inner segment with external limiting membrane. Some patients with congenital idiopathic nystagmus showed normal macular morphology and structure, and others showed indistinct macular external limiting membrane reflection. CONCLUSION: SD-OCT is an effective and reliable method to detect the macular morphology of congenital nystagmus patients. This technique has diagnostic value in particular for patients with macular hypoplasia and cone cell dystrophy with no distinct abnormality on fundoscopy. 展开更多
关键词 optical coherence tomography congenital nystagmus macular disease.
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A novel nonsense mutation of GPR143 gene in a Korean kindred with X-linked congenital nystagmus 被引量:2
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作者 Ungsoo Samuel Kim Eunhae Cho Hyon J.Kim 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2016年第9期1367-1370,共4页
Dear Editor,I am Dr.Ungsoo Samuel Kim.from Kim's Eye Hospital,Konyang University,Seoul,Korea.I write to present a novel mutation of GPR143 in Korean patients with X-linked congenital nystagmus by using exome sequenci... Dear Editor,I am Dr.Ungsoo Samuel Kim.from Kim's Eye Hospital,Konyang University,Seoul,Korea.I write to present a novel mutation of GPR143 in Korean patients with X-linked congenital nystagmus by using exome sequencing.Congenital nystagmus is an inherited ocular disorder that can occur as an X-linked condition. 展开更多
关键词 GPR A novel nonsense mutation of GPR143 gene in a Korean kindred with X-linked congenital nystagmus GENE
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A new measure of nystagmus acuity
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作者 Jun-Ping Yao Zheng Tai Zheng-Qin Yin 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2014年第1期95-99,共5页
AIM: To construct a new visual acuity measuring function for congenital nystagmus(CN) patients by studying the relationships between acuity,velocities and positions of the eye. ·METHODS: After assessing the relat... AIM: To construct a new visual acuity measuring function for congenital nystagmus(CN) patients by studying the relationships between acuity,velocities and positions of the eye. ·METHODS: After assessing the relationship between acuity,movement velocities and positions of the eye separately,a new function,which we call the automated nystagmus acuity function(ANAF),was constructed to measure the visual acuity of CN patients. Using a high-speed digital video system working at 500 frames per second,each eye was calibrated during monocular fixation. Twenty-six recorded nystagmus data were selected randomly. Using nystagmus waveforms,the best vision position(foveation period) and visual acuity were analyzed in three groups of subjects,and then all outputs were compared with the well-known expanded nystagmus acuity function(NAFX) and ANAF. Standard descriptive statistics were used to summarize the outputs of the two programs. ·RESULTS: Foveation periods were brief intervals in the CN waveform when the image was on or near the fovea and eye velocity was relatively slow. Results showed good visual acuity happened during the period when velocity was low and the eye position was near the zero position,which fitted the foveation periods. The data analyzed with NAFX and ANAF had a correlation coefficient of 0.934276,with an average error of-0.00973. · CONCLUSION: The results from ANAF and NAFX analyses showed no significant difference. The NAFX manually identifies foveation eye positions and produces accurate measurements. The ANAF,however,can be calculated simply using the factors eye position andvelocity,and it automatically calculates the ANAF without the need to manually identify foveation eye positions. 展开更多
关键词 nystagmus vision acuity nystagmus acuity function eye movement measurements
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Acute thrombosis of the carotid artery associated with positional nystagmus at multiple planes
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作者 Sertac Yetiser Yasar Kutukcu Kutlay Kahraman 《Journal of Otology》 CSCD 2019年第4期158-161,共4页
Objective:An acute onset central pathology without any clear neurological symptoms may mimic peripheral vestibular problem in an emergency setting.A 54-year-old man suddenly developed dizziness without any cranial ner... Objective:An acute onset central pathology without any clear neurological symptoms may mimic peripheral vestibular problem in an emergency setting.A 54-year-old man suddenly developed dizziness without any cranial nerve symptoms,paresis,cerebellar signs or sensory disturbances except upbeat positional nystagmus at multiple provoked positions which alerted for a possible acute central pathology.Findings:An instantaneous magnetic resonance imaging and angiography studies further showed obstruction of the left internal carotid artery above the bifurcation.The patient’s subsequent prognosis was consistent with good recovery following anti-coagulant therapy.A follow-up MRI and angiography showed resolution of thrombosis.Conclusion:It should be kept in mind that positional nystagmus is likely to occur in central pathologies.Differentiation between benign paroxysmal positional vertigo and central positioning nystagmus is critical. 展开更多
关键词 Upbeat nystagmus Positional MANEUVER CAROTID artery OCCLUSION
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Scaling Properties of Optokinetic Nystagmus Amplitude Sequence
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作者 Torbjørn Aasen 《Journal of Biomedical Science and Engineering》 2020年第11期229-234,共6页
Optokinetic nystagmus (OKN) is rhythmic eye movements, back and forth, with a slow and fast phase when the eyes are presented for full-field visual stimulus. OKN was recorded in a healthy subject for four conditions, ... Optokinetic nystagmus (OKN) is rhythmic eye movements, back and forth, with a slow and fast phase when the eyes are presented for full-field visual stimulus. OKN was recorded in a healthy subject for four conditions, stripes moving 30<span style="white-space:nowrap;">&#176;</span>/s left and right and 60<span style="white-space:nowrap;">&#176;</span>/s left and right. In this paper, surrogate data analysis was applied to test the Hurst exponents for increasing time horizons for the integrated OKN amplitude sequences statistically against 100 shuffled sequences (<em>i.e.</em>, the serial dependency of the original data sequences is broken by changing the order of the sequence). The result shows that the pattern of the OKN amplitude sequence scales statistically different (<em>p</em> < 0.01) compared to random permutations of the same numbers for scaling shorter than 16 nystagmus components (slow and fast phases) for all four test conditions. 展开更多
关键词 nystagmus OPTOKINETIC Hurst Exponent Information Processing
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Clinical Characteristics of Nystagmus in Albinos Living in Libreville
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作者 Prudence Ada Assoumou Tatiana Mba Aki +1 位作者 Olele Oussavou Emmanuel Mve Mengome 《Open Journal of Ophthalmology》 2020年第1期69-76,共8页
Introduction: Nystagmus is a static ocular disorder characterized by an oscillatory, involuntary and rhythmic movement of eyes. In Libreville, no data on the subject is available. The purpose of this study is to descr... Introduction: Nystagmus is a static ocular disorder characterized by an oscillatory, involuntary and rhythmic movement of eyes. In Libreville, no data on the subject is available. The purpose of this study is to describe clinical characteristics of nystagmus in albinos living in Libreville. Methods: This is a descriptive, cross-sectional study including 43 albinos with oculocutaneous albinism and nystagmus during the period from February 01, 2017 to February 01, 2018. Variables studied were age, sex, visual acuity, objective refraction, characteristics of the nystagmus including morphology, direction, intensity and associated signs such as stiff neck and squint. Results: The mean age was 21.2 ± 17 years with a female-dominated ratio of 0.53. The visual acuity from afar without correction (AVLSC) was less than 3/10 in 88.4% of the cases. The most common ametropia was astigmatism in 51.2% of cases. Nystagmus was present in all albinos. The spring type was found in 69.7% of cases. The direction was horizontal in 67.4% of the cases and rotary in 32.6% of the cases. The intensity was moderate in 55.8% of cases. The blocking position was the primary near vision position in 69.7% of the cases. Nystagmus was associated with a stiff neck in 28% of the cases and strabismus in 48.8% of the cases. Conclusion: The albinos nystagmus living in Libreville is of the spring type, horizontal direction, of moderate intensity and calmed in the primary position in near vision. 展开更多
关键词 nystagmus Albinos Libreville
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Surgical Treatment of a Patient with See-Saw Nystagmus (SSN): Case Report
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作者 Lelio Sabetti Gianluca Murano Francesca Guetti 《Open Journal of Ophthalmology》 2020年第4期283-287,共5页
Background: Acquired See-saw Nystagmus (SSN) is a rare form of nystagmus characterized by elevation and intorsion of one eye with synchronous depression and intorsion of the contralateral eye in the first half cycle, ... Background: Acquired See-saw Nystagmus (SSN) is a rare form of nystagmus characterized by elevation and intorsion of one eye with synchronous depression and intorsion of the contralateral eye in the first half cycle, followed by a reversal in the direction of the movements during the next half cycle. We herein report a case of a 47-year-old woman with a 3-year history of constant diplopia as a consequence of multiple neurosurgical interventions due to hemorrhage from a cavernous angioma located in the subthalamic region. She also had a history of major depressive disorder and ulcerative colitis. The patient underwent a surgical intervention with a 5 mm bilateral recession of the superior and inferior rectus muscles. Five years after surgery, the patient reported less recurrent and prominent episodes of transient horizontal deviation with horizontal diplopia, with a prevalence of well-being and comfort. 展开更多
关键词 Case Report See-Saw nystagmus Surgery Vertical Muscles Recession Abnormal Head Position (AHP)
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Direction-fixed positional nystagmus following head-roll testing:how is it related with a vestibular pathology?
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作者 Sertac Yetiser Dilay Ince 《Journal of Otology》 CSCD 2021年第3期123-127,共5页
Objective:The goal of this study is to analyze the clinical view of patients with direction-fixed positional nystagmus(DFPN)following head-roll maneuver.Methods:Sixty patients with DFPN were reviewed retrospectively.P... Objective:The goal of this study is to analyze the clinical view of patients with direction-fixed positional nystagmus(DFPN)following head-roll maneuver.Methods:Sixty patients with DFPN were reviewed retrospectively.Patients were categorized into 3 groups according to the direction of nystagmus based on rotation side.Associated problems were documented,and cumulative data were compared between groups.One-way analysis of variance(ANOVA test)was used for statistical analysis(P<0.05).Results:Thirty-three patients(55%)had stronger nystagmus beating towards the direction of head-roll(Group-A).Three patients developed geotropic LC-BPPV.Fourteen patients had inner ear disease.Sixteen patients(27%)had stronger nystagmus beating against the direction of head roll(Group-B).Nine patients had inner ear disease.None of the patients tested with head-shaking had change of direction of nystagmus.Eleven patients(18%)had DFPN with equal velocity during right or left head-roll maneuver(Group-C).Of those,nine patients had inner ear disease.None of the patients had change of direction of nystagmus.Comparison of the incidence of associated problems(migraine,vestibular neuronitis,Meniere’s disease etc.)in each group was not statistically significant(P˃0.05).Conclusion:Patients with DFPN should be followed for a possibility of vestibular pathology since vestibular problem was documented for more than half of the patients in the follow-up.On the other hand,DFPN could be related with a temporary reason(thermal,physical or drug effect etc.)in some patients who do not exhibit any associated disease.Head-shaking testing is recommended to expose the lateral canal BPPV.But the incidence is low. 展开更多
关键词 Positional nystagmus Head-roll maneuver Vestibular pathology
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Botulinum Toxin for the Treatment of Nystagmus Associated with Exotropia
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作者 Lelio Sabetti Francesca Guetti +1 位作者 Valeria Pomanti Gianluca Murano 《Open Journal of Ophthalmology》 2022年第4期392-396,共5页
Purpose: Nystagmus can severely impact the visual function, lifestyle and quality of life of patients. Patient with Nystagmus may assume an abnormal compensatory head position and it can result in posture disorders. B... Purpose: Nystagmus can severely impact the visual function, lifestyle and quality of life of patients. Patient with Nystagmus may assume an abnormal compensatory head position and it can result in posture disorders. Botulinum toxin is an important treatment for much pathology of the eye, in particular for blepharospasm, strabismus and nystagmus. The mechanism of action is to prevent lease of acetylcholine in the neuromuscular junction getting the neuromuscular blockade and transient flaccid paralysis. The objective of this work is to evaluate the efficacy of botulinum toxin injection in patients with Nystagmus. Methods: n. 6 patients, (3 females and 3 males) aged 17 - 35 years, exhibiting exotropia (XT) associated with Nystagmus received an injection of Botulinum Toxin A Dysport (Ipsen) in the Lateral Muscles of each eye with a 27-gauge retrobulbar needle. Patients underwent an orthoptic and ophthalmic eye exam before and after surgery. Results: A significant reduction of the nystagmus in primary position was reported in all patients;the abnormal position of the head was noticeably reduced. Side-effects were limited and well tolerated by the patients. Conclusion: Botulinum toxin injection is a valuable treatment of Nystagmus associated with exotropia. 展开更多
关键词 nystagmus Botulinum Toxin EXOTROPIA STRABISMUS
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Benign paroxysmal positional vertigo with congenital nystagmus: A case report
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作者 Gui-Fang Li Yue-Tang Wang +3 位作者 Xin-Ge Lu Man Liu Chao-Bing Liu Chun-Hua Wang 《World Journal of Clinical Cases》 SCIE 2022年第31期11625-11629,共5页
BACKGROUND Benign paroxysmal positional vertigo(BPPV)is a form of temporary vertigo induced by moving the head to a specific position.It is a self-limited,peripheral,vestibular disease and can be divided into primary ... BACKGROUND Benign paroxysmal positional vertigo(BPPV)is a form of temporary vertigo induced by moving the head to a specific position.It is a self-limited,peripheral,vestibular disease and can be divided into primary and secondary forms.Congenital nystagmus(CN),an involuntary,rhythmic,binocular-symmetry,conjugated eye movement,is found at birth or within 3 mo of birth.According to the pathogenesis,CN can be divided into sensory-defect nystagmus and motordefect nystagmus.The coexistence of BPPV and CN is rarely seen in the clinic.CASE SUMMARY A 62-year-old woman presented to our clinic complaining of a 15-d history of recurrent positional vertigo.The vertigo lasting less than 1 min occurred when she turned over,sometimes accompanied by nausea and vomiting.Both the patient and her father had CN.Her spontaneous nystagmus was horizontal to right;however,the gaze test revealed variable horizontal nystagmus with the same degree when the eyes moved.The patient’s Dix-Hallpike test was normal,except for persistent nystagmus,and the roll test showed severe variable horizontal nystagmus,which lasted for about 20 s in the same direction as her head movement to the right and left,although the right-side nystagmus was stronger than the left-side.Since these symptoms were accompanied by nausea,she was diagnosed with BPPV with CN and treated by manual reduction.CONCLUSION Though rare,if BPPV with CN is correctly identified and diagnosed,reduction treatment is comparably effective to other vertigo types. 展开更多
关键词 CONGENITAL nystagmus Benign paroxysmal positional vertigo Case report
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HINTS联合血清IL-6诊断孤立性眩晕患者脑梗死的价值研究
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作者 伊帅 徐晓辰 +3 位作者 于笑峰 李云龙 王永久 贺西亮 《浙江医学》 CAS 2024年第19期2056-2060,共5页
目的 探讨头脉冲-眼震-眼偏斜(HINTS)联合血清IL-6诊断孤立性眩晕患者脑梗死的价值。方法 回顾性选择2022年6月至2023年10月青岛市第八人民医院收治的91例孤立性眩晕患者,根据临床评估及颅脑MRI检查结果分为脑梗死组23例和周围性眩晕组6... 目的 探讨头脉冲-眼震-眼偏斜(HINTS)联合血清IL-6诊断孤立性眩晕患者脑梗死的价值。方法 回顾性选择2022年6月至2023年10月青岛市第八人民医院收治的91例孤立性眩晕患者,根据临床评估及颅脑MRI检查结果分为脑梗死组23例和周围性眩晕组68例。比较两组患者的一般资料、实验室检查结果;所有患者入院即行HINTS床旁检查,根据HINTS检查结果初步诊断为脑梗死或周围性眩晕,与临床评估及颅脑MRI检查作出的诊断进行比较。采用多因素logistic回归分析影响孤立性眩晕患者脑梗死的危险因素。采用ROC曲线评估HINTS、血清IL-6及HINTS联合血清IL-6对孤立性眩晕患者脑梗死的诊断效能。结果 脑梗死组吸烟、糖尿病、高血压、椎基底动脉狭窄患者占比及FPG、血清IL-6水平均高于周围性眩晕组(均P<0.05)。多因素logistic回归分析显示高血清IL-6水平(OR=1.445,95%CI:1.016~2.054)是孤立性眩晕患者脑梗死的危险因素(P<0.05)。HINTS对孤立性眩晕患者脑梗死的诊断灵敏度为0.826(95%CI:0.612~0.951),特异度为0.868(95%CI:0.764~0.938),阳性预测值为0.679(95%CI:0.528~0.800),阴性预测值为0.937(95%CI:0.858~0.973),准确度为0.857(95%CI:0.768~0.922)。ROC曲线分析结果显示HINTS、血清IL-6、HINTS联合血清IL-6诊断孤立性眩晕患者脑梗死的灵敏度分别为0.826、0.696、0.826,特异度分别为0.868、0.735、0.897,AUC分别为0.847、0.751、0.919。结论 HINTS联合血清IL-6对孤立性眩晕患者脑梗死有较高的诊断效能。 展开更多
关键词 头脉冲-眼震-眼偏斜 IL-6 眩晕 脑梗死
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基于虚拟现实全视野刺激下便携式眼震视图仪所测视动性眼震参数的可信度研究
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作者 蔡宏斌 黄藤月 +1 位作者 古扎力努尔·尼扎木丁 孟子程 《世界复合医学》 2024年第2期1-4,27,共5页
目的探究便携式眼震视图仪基于虚拟现实全视野刺激下测得的视动性眼震(optokinetic nystagmus,OKN)参数的可信度。方法单纯随机选取2022年7月—2023年6月兰州大学第二医院纳入的60例健康受试者为研究对象,按照随机数表法分为两组,每组30... 目的探究便携式眼震视图仪基于虚拟现实全视野刺激下测得的视动性眼震(optokinetic nystagmus,OKN)参数的可信度。方法单纯随机选取2022年7月—2023年6月兰州大学第二医院纳入的60例健康受试者为研究对象,按照随机数表法分为两组,每组30例,对照组采用传统全视野刺激眼震视图仪,观察组采用便携式虚拟现实全视野刺激眼震视图仪,对比两组设备的OKN参数数值。结果观察组左眼眼震次数、慢相速度、快相速度、慢相时间、快相时间、增益、慢相速度/快相速度、慢相时间/快相时间为(21.26±4.26)次、(51.23±4.45)°/s、(304.52±12.26)°/s、(280.52±24.26)ms、(50.52±12.26)ms、0.74±0.26、0.18±0.04、6.05±1.26,与对照组对比,差异无统计学意义(t=0.332、0.196、0.545、0.479、0.019、0.310、0.968、0.186,P均>0.05)。两组自发性眼动试验结果对比,差异无统计学意义(P>0.05)。结论虚拟现实全视野刺激下便携式眼震视图仪用于测定OKN参数的可信度较高,与传统全视野刺激眼震视图仪所测得的OKN参数比值差异较小,并且二者所测得的自发性眼震试验结果亦无明显差异,表明便携式眼震视图仪在眼震检查方面具有较高的准确性。 展开更多
关键词 便携式眼震视图仪 虚拟现实技术 全视野 视动性眼震参数
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Stereopsis Disorders in Patients with Congenital Nystagmus
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作者 Chunmin Liu, Jingcun YangDepartment of Ophthalmology, Affiliated Hospital of Medical CollegeJinan University, Guangzhou 510632 , ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Henan Medical UniversityZhengzhou 450052, China 《眼科学报》 1997年第1期1-4,共4页
Purpose: To investigate the stereopsis functions in the cases of congenital nystagmus (CN) and determine the relations between nystagmus, visual acuity (VA) and stereoacuity (SA).Methods: The random-dot stereograms wa... Purpose: To investigate the stereopsis functions in the cases of congenital nystagmus (CN) and determine the relations between nystagmus, visual acuity (VA) and stereoacuity (SA).Methods: The random-dot stereograms was used to examine the patients' SA, crossed and uncrossed disparity. The oscillation types of the eyeballs were determined under the naked eyes cooperating with the electronystagmorgraphy ( ENG) examination. VA was measured at 5m and 30cm with distance and near International Standard Charts. The patient was permitted to see the target with his compensatary head posture.Results: Of the 57 patients tested, only 8 cases have normal stereopsis including normal SA,crossed and uncrossed disparity, which are all the jerk nystagmus. Forty-one have abnormal SA including 19 stereoblind, 18 abnormal stereopsis and 4 abnormal SA only. Serious damages of stereopsis exist in most of the pendular and more than half of the jerk nystagmus. The relations between stereopsis and VA are that (1)the better the 展开更多
关键词 先天性眼球震颤 视觉灵敏度 视觉深度知觉
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急性前庭综合征患者脑梗死的临床特征及相关因素分析 被引量:2
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作者 张春悦 方力群 《中国全科医学》 CAS 北大核心 2024年第14期1678-1684,共7页
背景急性脑梗死是急性前庭综合征中较为危重的疾病。急性前庭综合征患者起病急,症状重,CT诊断急性脑梗死的灵敏度低,而核磁共振检查又不易立即实施,这使得表现为急性前庭综合征的急性脑梗死诊断具有一定挑战性,因此有必要探究适用于急... 背景急性脑梗死是急性前庭综合征中较为危重的疾病。急性前庭综合征患者起病急,症状重,CT诊断急性脑梗死的灵敏度低,而核磁共振检查又不易立即实施,这使得表现为急性前庭综合征的急性脑梗死诊断具有一定挑战性,因此有必要探究适用于急性前庭综合征患者的检查和评价方法。目的分析急性前庭综合征患者中急性脑梗死发生的相关危险因素,为急性前庭综合征中急性脑梗死的诊断提供借鉴,争取急性脑梗死患者的黄金治疗时间。方法收集2021年4月—2022年7月就诊于哈尔滨医科大学附属第四医院神经内科急性前庭综合征患者102例,录入相关临床体征,以核磁共振检查结果作为脑梗死诊断的金标准,分为脑梗死组(16例)与非脑梗死组(86例),对比两组患者临床特点,采用单因素和多因素Logistic回归分析探究急性前庭综合征中脑梗死发生的相关影响因素,并绘制受试者工作特征(ROC)曲线评价相关影响因素对脑梗死的预测价值。结果脑梗死组患者吸烟史、饮酒史、头脉冲试验-眼震-眼位偏斜试验(HINTS)阳性比例、ABCD2评分均高于非脑梗死组(P<0.05)。单因素Logistic回归分析显示HINTS阳性、ABCD2评分、吸烟史、饮酒史、听力下降是脑梗死发生的影响因素(P<0.05),多因素Logistic回归分析显示HINTS阳性(OR=99.043,95%CI=8.120~1208.090)和ABCD2评分(OR=2.820,95%CI=1.188~6.696)是脑梗死发生的影响因素(P<0.05)。多指标联合、HINTS阳性、ABCD2评分、吸烟史、饮酒史、听力下降预测脑梗死的ROC曲线下面积(AUC)为0.949、0.874、0.734、0.643、0.649和0.604。结论急性前庭综合征患者中非脑梗死比例较大,其中以前庭神经炎最常见,HINTS阳性和ABCD2评分与急性前庭综合征中脑梗死的发生密切相关。 展开更多
关键词 急性持续性头晕 急性前庭综合征 脑梗死 头脉冲试验-眼震-眼位偏斜试验 危险因素
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