Evaluation of the Clinical Efficacy of Full Femtosecond Laser Surgery in the Treatment of Myopia

Objective:To evaluate the clinical effect of full femtosecond laser surgery in the treatment of myopia patients.Methods:120 myopia patients admitted to our hospital from January 2022 to June 2023 were selected.According to the random number table method,60 patients in the observation group underwent full femtosecond laser surgery,and 60 patients in the control group underwent femtosecond laser-assisted in situ keratomileusis(FS-LASIK)surgery.The clinical effects of the two groups were compared.Results:10 days postoperatively and 6 months after operation,the visual acuity level of the observation group was higher than that of the control group,the postoperative corneal asphericity coefficient and corneal full-thickness were lower than those of the control group,and the total effective rate 6 months after operation was higher than that of the control group(P<0.05).Conclusion:Full femtosecond laser surgical treatment can improve the postoperative visual acuity of patients with myopia,enhance the corneal asphericity coefficient(Q)and corneal full-thickness,and exert significant clinical effects.

Evaluation of a novel deep learning based screening system for pathologic myopia

AIM:To evaluate the clinical application value of the artificial intelligence assisted pathologic myopia(PM-AI)diagnosis model based on deep learning.METHODS:A total of 1156 readable color fundus photographs were collected and annotated based on the diagnostic criteria of Meta-pathologic myopia(PM)(2015).The PM-AI system and four eye doctors(retinal specialists 1 and 2,and ophthalmologists 1 and 2)independently evaluated the color fundus photographs to determine whether they were indicative of PM or not and the presence of myopic choroidal neovascularization(mCNV).The performance of identification for PM and mCNV by the PMAI system and the eye doctors was compared and evaluated via the relevant statistical analysis.RESULTS:For PM identification,the sensitivity of the PM-AI system was 98.17%,which was comparable to specialist 1(P=0.307),but was higher than specialist 2 and ophthalmologists 1 and 2(P<0.001).The specificity of the PM-AI system was 93.06%,which was lower than specialists 1 and 2,but was higher than ophthalmologists 1 and 2.The PM-AI system showed the Kappa value of 0.904,while the Kappa values of specialists 1,2 and ophthalmologists 1,2 were 0.968,0.916,0.772 and 0.730,respectively.For mCNV identification,the AI system showed the sensitivity of 84.06%,which was comparable to specialists 1,2 and ophthalmologist 2(P>0.05),and was higher than ophthalmologist 1.The specificity of the PM-AI system was 95.31%,which was lower than specialists 1 and 2,but higher than ophthalmologists 1 and 2.The PM-AI system gave the Kappa value of 0.624,while the Kappa values of specialists 1,2 and ophthalmologists 1 and 2 were 0.864,0.732,0.304 and 0.238,respectively.CONCLUSION:In comparison to the senior ophthalmologists,the PM-AI system based on deep learning exhibits excellent performance in PM and mCNV identification.The effectiveness of PM-AI system is an auxiliary diagnosis tool for clinical screening of PM and mCNV.

Application of optical coherence tomography angiography in assessment of posterior scleral reinforcement for pathologic myopia

AIM： To investigate the effect of posterior scleral reinforcement （PSR） on circulation of pathologic myopia eyes with posterior staphyloma by optical coherence tomography angiography （OCTA）.METHODS： The study included 30 pathologic myopia eyes with posterior staphyloma which underwent PSR （PSR group） for 6 to 18mo ago, and 30 age and myopia matched eyes without PSR surgery as control group. Macular, choriocapillaris and radial peripapillary capillary （RPC） flow density were measured by OCTA, and the measurements were compared between groups. RESULTS： OCTA found no significant differences in macular flow density between PSR and control groups. For the superficial flow, whole enface flow density （WED）, fovea density （FD）, and parafoveal density （PD） were 46.55%±5.19% vs 47.29%±4.12% （P=0.542）, 31.45%±6.35% vs 31.17%±4.48% （P=0.841）, and 48.82%±5.66% vs 49.21%±4.15% （P=0.756） in PSR and control groups, respectively. For the deep flow, WED, FD, and PD were 52.07%±5.78% vs 53.95%±4.62% （P=0.168）, 29.62%±6.55% vs 29.50%±6.38% （P=0.940）, and 56.93%±6.17% vs 58.15%±5.13% （P=0.407） in PSR and control groups, respectively. The choriocapillary flow density was 61.18±3.25% in PSR group vs 60.88%±2.56% in control group （P=0.692）. Also, OCTA found no significant differences in RPCs flow density between PSR and control groups. The optic disc WED, inside disc flow density and peripapillary flow density were 48.47%±4.77% vs 48.11%±4.57% （P=0.813）, 45.47%±11.44% vs 46.68%±9.02% （P=0.709）, 54.32%±5.29% vs 52.47%±6.62% （P=0.349） in PSR and control groups, respectively.CONCLUSION： OCTA provides a non-invasive and quantitative approach for monitoring macular and papillary blood flow in pathologic myopia. PSR can not improve but may maintain the circulation of pathologic myopia eyes with posterior staphyloma.

Posterior scleral reinforcement for the treatment of pathological myopia

AIM： To investigate the effects of posterior scleral reinforcement（PSR） in the treatment of pathological myopia.·METHODS： The study included 52 eyes in 43 patients with pathological myopia who underwent PSR（PSR group）, and 52 eyes in 36 age- and myopia-matched patients who did not undergo such treatment as control group. Axial length, refraction error, best corrected visual acuity（BCVA）, and macular scans by optical coherence tomography（OCT） were recorded at baseline, 6mo, 1, 3and 5y after the surgery, and the complications were noted.·RESULTS： There were no statistical differences in axial length, refractive error, or BCVA between the PSR group and the control group at baseline. At the end of the follow-up, the mean axial length was 29.79 ±1.26 mm in the PSR group, which was significantly shorter than that in the control group（30.78±1.30 mm）（P 〈0.01）, and the mean refractive error was-16.86 ±2.53 D in the PSR group, which was significantly lower than that in the control group（-19.18 ±2.12 D）（P 〈0.01）. A statistically significant difference in BCVA was found between the PSR group（0.51 ±0.25 log MAR） and the control group（0.62±0.26 log MAR） at the postoperative 5-year follow-up（P 〈0.01）. There were no serious complications during the 5-year follow-up period.·CONCLUSION： PSR can prevent axial elongation and myopia progression in eyes with pathological myopia.

Long-term clinical effects of intravitreal injections of conbercept for the treatment of choroidal neovascularization in patients with pathological myopia

AIM:To observe the long-term clinical efficacy of intravitreal injections of conbercept,a novel vascular growth factor inhibitor,for the treatment of pathological myopia choroidal neovascularization(PM-CNV).METHODS:A total of 67 eyes(from 67 patients;mean age,54.90±12.7y)with PM-CNV were retrospectively researched.Based on the different schemes used for the administration of the drug,the patients were divided into two groups:group A(n=35;average age,53.31±13.6y;average diopter,9.25±1.72 D),which received only one injection of pro re nata(PRN;1+PRN regimen),and group B(n=32;average age,56.49±11.8y;average diopter,9.63±2.24 D),which received one injection per month for 3mo(3+PRN regimen).Best-corrected visual acuity(BCVA)analysis,intraocular pressure(IOP)examination,slit-lamp microscopy,fundus examination and optical coherence tomography were per formed at each follow-up.The recurrence and treatment times of CNV were recorded.The patients were followed up for at least 12mo.RESULTS:The BCVA was increased in 29 eyes(82.9%)in group A and 30 eyes(93.75%)in group B;no increase or decrease was observed in 6(17.1%)and 2(6.25%)eyes in groups A and B,respectively.The BCVA(log MAR)values before treatment(0.67±0.48 and 0.71±0.56)were significantly higher than those 12mo after treatment(0.31±0.26 and 0.33±0.17)in groups A and B,respectively(P<0.05).The mean central macular thickness(CMT)values had significantly decreased from 346.49±65.99 and 360.10±82.31μm at baseline to 257.29±40.47 and 251.97±48.26μm in groups A and B,respectively,after 12mo of treatment.A total of 21 eyes in group A needed reinjection(60%;average number of injections,2.51±0.98);the corresponding values in group B were 6 eyes(18.75%;average number of injections,3.74±1.22).There were no adverse ocular and systemic complications during the treatment and follow-up.CONCLUSION:Intravitreal injection of conbercept with 1+PRN or 3+PRN improve the visual acuity,reduce macular edema and reduce the level of CMT in patients with PM-CNV.The 3+PRN regimen demonstrates a lower recurrence rate of CNV than the 1+PRN regimen,but requires more treatment.However,both treatment regimens demonstrate long-term safety and efficacy for the treatment of PM-CNV.

Clinical Study of “Lingqi Huangban Granule” in Treating Choroidal Neovascularisation in Pathologic Myopia

Objectives: To study the therapeutic effects of “Lingqi Huangban Granule” (LQHB) combined with intravitreal ranibizumab injection (IVR) for choroidal neovascularisation (CNV) in pathologic myopia (PM). Methods: This was a prospective, comparative, interventional study. Eighty eyes of eighty consecutive patients with myopic CNV were randomized into control group (IVR, 40 eyes) and integrative therapy group (IVR + LQHB, 40 eyes), each with a follow-up period of 12 months. IVR was given with an “on demand” regimen (Pro re nata, PRN). Final best corrected visual acuity (BCVA) and its change from baseline were the main outcome measures. Changes in optical coherence tomography (OCT) and central retinal thickness (CRT) were the secondary outcome measures. Results: BCVA of patients in the integrative group improved significantly (from 47.10 ± 13.51 letters to 90.72 ± 12.98 letter, P 0.05), more than in the control group (from 42.90 ± 13.18 letters to 69.18±13.21 letters, P 0.05) since the third month after the initial treatment to the end of the follow-up. Mean OCT CRT reduced from 364.75 ± 69.31 to 278.93 ± 33.05 um (P 0.05) in the control group and from 370.73 ± 65.31 to 271.73 ± 46.44 um (P 0.05) in the integrative group, respectively. The mean number of intravitreal injections in the 1-year follow-up was also reduced. No ocular or systemic side effects were observed. Conclusion: LQHB combined with IVR therapy was an effective treatment for stabilizing and improving vision with fewer intravitreal injections. It appears to be an interesting option for this type of patient.

Co-existent choroidal neovascular membrane and macular hole in pathologic myopia:a long follow-up clinical outcome and literature review

Choroidal neovascularization(CNV)is an uncommon complication associated with a macular hole.In this case report of a rare condition,we present a pathologic myopia patient with a co-existent macular hole and choroidal neovascular membrane.The patient was treated with photodynamic therapy for CNV,and then vitreous surgery for the retinal detachment and macular hole.At the end of 4 years follow-up,her visual acuity was improved to 0.1 while the macular hole remained open.Optical coherence tomography is a useful inspection method of the diagnosis of CNV and macular hole.

Choroidal neovascularization secondary to pathological myopia

Myopic choroidal neovascularization(m CNV), one of the complications of pathological myopia, is also one of the leading causes of visual impairment worldwide. The socioeconomic impact of mC NV in Asian countries is particularly significant due to the rising incidence of pathological myopia. There have been major advances in the treatment of mC NV in the past few years. Previous treatment modalities, such as thermal laser photocoagulation and photodynamic therapy, aimed to prevent vision loss;however, newer modalities such as intravitreal anti-vascular endothelial growth factor(VEGF) agents have been shown to successfully restore vision in many patients. Challenges remain as long term safety and efficacy of anti-VEGF agents are unknown. This article aims to provide a review of the literature of the epidemiology, progression, clinical course and treatment modalities as well as areas of future developments related to myopic CNV.

Fundus Analysis and Visual Prognosis of Macular Hemorrhage in Pathological Myopia without Choroidal Neovasculopathy

Purpose:To analysis and evaluate the fundus characteristics and visual prognosis of macular hemorrhage in pathological myopia without choroidal neovasculopathy. Methods:Thirty-seven patients (38 eyes) of pathological myopia with macular hemorrhage and without choroidal neovascularization (CNV) underwent color photograph and fundus fluorescein angiography (FFA) examinations. Indocyanine green angiography (ICGA) was also performed on 11 patients (11 eyes). Follow-up ranged from 3 to 21 months. Results:The macular hemorrhage in pathological myopia without CNV demonstrated oval, less than 1PD, without edema and exudation. Lacquer cracks appeared at the site of previous subretinal bleeding in 84.2% of the eyes. The visual acuities were improved in 81.6% of eyes during the follow-up period. ICGA revealed linear hypofluorescence in 7 of 11 eyes (63.6%), indicating a ruptured Bruch’s membrance at the onset of subretinal bleeding. Conclusion:A rupture of choriocapillaris complex and Bruch’s membrane causes macular hemorrhage of pathological myopia without CNV, leading to the formation of a new lacquer crack. Its prognosis is favorable. Eye Science 2004;20:57-62.

Pathologic myopia

Pathologic myopia is the major cause of the loss of the best-corrected visual acuity(BCVA)worldwide,especially in East Asian countries.The loss of BCVA is caused by the development of myopic macula patchy,myopic traction macula patchy,and myopic optic neuropathy(or glaucoma).The development of such vision-threatening complications is caused by eye deformity,characterized by a formation of posterior staphyloma.The recent advance in ocular imaging has greatly facilitated the clarification of pathologies and pathogenesis of pathological myopia and myopia-related complications.These technologies include ultra-wide field fundus imaging,swept-source optical coherence tomography,and 3D MRI.In addition,the new treatments such as anti-VEGF therapies for myopic choroid all neovascularization have improved the outcome of the patients.Swept-source OCT showed that some of the lesions of myopic maculopathy were not simply chorioretinal atrophy but were Bruch’s membrane holes.Features of myopic traction maculopathy have been analyzed extensively by using OCT.The understanding the pathophysiology of complications of pathologic myopia is considered useful for better management of this blinding eye disease.

Clinicopathologic features, diagnosis and surgical treatment of intrahepatic cholangiocarcinoma in 104 patients

BACKGROUND: The outcome of surgical treatment of pa- tients with intrahepatic cholangiocarcinoma (ICC) is poor. This study was designed to analyze the relationship between clinicopathologic features and the survival time after opera- tion. METHODS: The operation was performed in 104 patients with mass-forming type ICC at our hospital between No- vember 1996 and May 2000. Seventy-nine patients (76.0%) were followed up successfully. Sixteen clinicopathological variables including age, sex, history of chronic liver di- sease , HBsAg, operation, adjuvant therapy, ascites, lymph node metastasis, invasion of adjacent organs, tumor size, necrosis of tumor, envelope, intrahepatic metastasis, Inter- national Union Against Cancer (UICC) TNM staging, his- tology, and cirrhosis were selected for univariate and multi- variate analyses to evaluate their influence on the prognosis. RESULTS: The accumulative 1-, 3-, 5-year survival rates of the 79 patients were 49.4%, 17.3%, 9.6% respectively. Univariate analysis revealed that sex (P=0.0221), HBsAg (P=0.0115), operation (P=0.0042), adjuvant therapy (P= 0.0389), ascites (P=0.0001), invasion (P=0.0220), intra- hepatic metastasis (P=0.0000) and TNM stage (P= 0.0001) were related to survival time. Multivariate analysis revealed that HBsAg, ascites and TNM stage were signifi- cantly related to prognosis. CONCLUSION: Early diagnosis and treatment and major hepatectomy are essential to improving the results of surgi- cal treatment of ICC patients.

Clinicopathological analysis of patients with gastric cancer in 1200 cases

INTRODUCTIONGastric cancer is one of the most common fatal malignancies in the world. The prognosis is generally poor in advanced gastric cancer .The low survival is related to delayed diagnosis, metastasis and recurrence after operation .The aim of this paper was to find correlation between clinical factors was to find correlation between clinical factors and biologic behavior of gastric cancer in a series of 1200 patients undergoing surgical resection.

Long-term follow-up of vitrectomy in patients with pathologic myopic foveoschisis

AIM： To report the long-term surgical outcomes of pathologic myopic foveoschisis（MF） following vitrectomy.METHODS： We performed a retrospective case series analysis of 50 consecutive patients diagnosed with MF who experienced vision loss due to progression of foveoschisis.The 50 patients（67 eyes） were treated in our hospital with vitrectomy with internal limiting membrane（ILM） peeling from December 2004 to September 2010.Best corrected visual acuity（BCVA）,refractive error,optical coherence tomography（OCT）,and routine examination results were analysed.The changes of BCVA,foveal anatomical features on OCT scan,and complications were the main outcome measures.RESULTS： The mean follow-up duration was 42±17mo（range 24 to 93mo）.BCVA improved significantly postoperatively（0.76±0.65 logM AR） compared with preoperative baselines（1.31±0.78 log MAR,P〈0.0001）,and in 53 eyes（79%） including 3 lines gain in 44 eyes（66%） at the last follow-up visit.OCT scans showed that central retinal thickness decreased from 580.0±270.0 μm preoperatively（n=67） to 179.7±84.7 μm postoperatively（n=58,P〈0.0001）.Total resolution of foveoschisis occurred in 41 eyes（61%）.Preoperative BCVA correlated well with postoperative BCVA,whereas other factors such as age,axial length,and refractive error were not correlated.The most common complications were cataract and full-thickness macular hole formation in 14 and 9 cases,respectively.CONCLUSION： Patients with progressive vision loss due to MF who were treated with vitrectomy with ILM peelingshow favourable outcomes.In most eyes,visual acuity and foveal structure remain stable during long-term observation.

Clinicopathological and prognostic analysis of 429 patients with intrahepatic cholangiocarcinoma

AIM:To understand the clinicopathological characteristics and treatment selections and improve survival and provide valuable information for patients with intrahepatic cholangiocarcinoma(ICC). METHODS:We retrospectively evaluated 5311 liver cancer patients who received resection between October 1999 and December 2003.Of these,429(8.1%)patients were diagnosed with ICC,and their clinicopathological, surgical,and survival characteristics were analyzed. RESULTS:Upper abdominal discomfort or pain(65.0%), no symptoms(12.1%),and hypodynamia(8.2%)were the major causes for medical attention.Laboratory tests showed 198(46.4%)patients were HBsAg positive, 90(21.3%)hadα-fetoprotein>20μg/L,50(11.9%) carcinoembryonic antigen>10μg/L,and 242(57.5%) carbohydrate antigen 19-9(CA19-9)>37 U/mL.Survival data was available for 329(76.7%)patients and their mean survival time was 12.4 mo.The overall survival of the patients with R0,R1 resection and punching exploration were 18.3,6.6 and 5.6 mo,respectively. Additionally,CA19-9>37 U/mL was associated with lymph node metastases,but inversely associated withcirrhosis.Multivariate analysis indicated that radical resection,lymph node metastases,macroscopic tumor thrombi and size,and CA19-9 were associated with prognosis. CONCLUSION:Surgical radical resection is still the most effective means to cure ICC.Certain laboratory tests(such as CA19-9)can effectively predict the survival of the patients with ICC.

Evaluation of preoperative dry eye in people undergoing corneal refractive surgery to correct myopia

AIM: To investigate the incidence of preoperative dry eye and related factors in patients undergoing corneal refractive surgery to correct myopia.METHODS: A total of 141 patients with myopia who underwent corneal refractive surgery were surveyed by questionnaires, tear film break-up time(BUT) test, Schimer I test(SIt), corneal fluorescein staining(FL) test and diagnosed according to the currently recognized domestic diagnostic criteria for dry eye. Correlation analysis of factors such as age, gender, regular wearing of contact lens(CL), diopter(spherical equivalent), corneal thickness, and corneal curvature that may affect the onset of dry eye was carried out to clarify the main influencing factors. RESULTS: There were 64 patients(45.39%) diagnosed with dry eye. The male patients(20.31%) was significantly less than that of non-dry eye subjects(41.56%;χ~2=7.260, P=0.007);the proportion of patients with dry eye wearing CL(81.25%) was significantly higher than that of non-dry eye subjects(51.95%;χ~2=13.234, P<0.001);the median diopter level of dry eye patients was-6.59(IQR:-8.87,-4.58) D, and the median diopter level of non-dry eye subjects was-5.69(IQR:-7.15,-4.03) D. The diopter level of dry eye patients was significantly higher(Z=-2.086, P=0.019). However, the age, best corrected visual acuity, and intraocular pressure of dry eye patients were not statistically different from those of non-dry eye subjects(t=-0.257,-0.383 and 0.778, P=0.798, 0.702, and 0.438);the corneal thickness and corneal curvature(K1 and K2) were also not statistically different either(Z=-1.487,-1.036 and-1.707, P=0.137, 0.300, and 0.088). The research further analyzes the three significant factors in the single factor analysis(gender, CL wear, and diopter) in a multi-factor way: CL wear and diopter were the influencing factors of dry eye disease. Among them, CL wear increased the risk of dry eye by 2.934 times compared with no CL wear;for every 1 D increase in diopter, the risk of dry eye increased by 0.761 times.CONCLUSION: Preoperative dry eye is relatively common in patients who undergo corneal refractive surgery to correct myopia, especially in patients who have a history of CL wear and a high diopter level before surgery. Therefore, it is necessary to carry out preoperative screening and timely treatment of dry eye to obtain the best treatment outcome and postoperative satisfaction.

A clinicopathological analysis in unsuspected gallbladder carcinoma: A report of 23 cases

AIM: To study the clinicopathological characteristics of unsuspected gallbladder carcinoma (UGC). METHODS: We retrospectively studied 23 cases of UGC in Tongji Hospital, and compared their clinicopathological characteristics with 33 cases of preoperatively diagnosed gallbladder carcinoma (PDGC).RESULTS: The proportion of UGC coexisting with cholecystolithiasis was significantly higher than that of PDGC (χ2 = 13.53, P < 0.01). The infection rate of hepatitis B virus was 21.74% (5/23) in UGC and 30.30% (10/33) in PDGC. Nine (39.13%) of 23 patients with UGC and 8/33 (24.24) PDGC had contact with schistosome pestilent water. The rate of multiple pregnancies was 56.52% (13/23) in the patients with UGC and 42.42% (14/33) in PDGC. The primary location of the UGC was mostly in the neck and body of the gallbladder, and that of the PDGC was often in the body and bottom. The incidence of Nevin stageⅠand Ⅱ UGC was significantly higher than that of PDGC (χ2 = 4.44, P < 0.05 and χ2 = 4.96, P < 0.05) while that of Nevin stage Ⅴ UGC was significantly lower than that of PDGC (χ2 = 7.59, P < 0.01). According to the grading of carcinoma, the incidence of well-differentiated UGC was significantly higher than that of PDGC (χ2 = 4.16, P < 0.05), and that of poorly-differentiated UGC was significantly lower than that of PDGC (χ2 = 4.48, P < 0.05).CONCLUSION: There are different characteristics between UGC and PDGC, such as in primary location, malignant degree and incidence of coexistence with cholecystolithiasis. Cholecystolithiasis, hepatitis B, schistosome and multiple pregnancies were high risk factors for gallbladder carcinoma.

Long-term observation on safety and visual quality of implantable collamer lens V4c implantation for myopia correction:a 5-year follow-up

AIM:To elucidate the safety and visual quality of implantable collamer lens with central hole(ICL V4c)implantation for correcting moderate and high myopia for at least 5y.METHODS:This retrospective study was conducted on 58 patients(114 eyes)who were followed up for at least 5y after ICL V4c implantation.The observation was done before and on 1d,1mo,1 and 5y or more after the surgical procedure.The visual acuity,subjective refraction,intraocular pressure,vault,axial length,central hole position,pupil diameter,visual quality,and adverse events were analyzed.The visual quality includes aberration,the modulation transfer function cutoff frequency(MTF cutoff),objective scattering index(OSI),Stroller's ratio(SR),and visual quality questionnaire.RESULTS:The average follow-up period was 69.25±3.80mo(range 60–82mo)and the preoperative spherical equivalent(SE)was-8.66±1.97 D.At 5y after operation,the safety index was 1.01±0.02 and the efficacy index was 0.99±0.42 and SE was-0.65±0.63 D.The 59.6%of the eyes achieved an uncorrected distance visual acuity of 20/20,76.3%of the eyes had SE within±1.0 D at the last visit.The axial length increased by 0.29±0.71 mm 5y after the surgery(t=-3.843,P<0.001).The mean vault at the last follow-up was 510.59±245.61μm.The central hole was on the temporal side in 80 eyes(84.2%).The visual quality questionnaire showed that 98.2%patients were satisfied with the surgical procedure.Adverse events occurred in 4 eyes(3.5%),including the posttraumatic toric ICL rotation(2 eyes),iris incarceration(1 eye),and posttraumatic ICL displacement(1 eye)at the last follow-up.CONCLUSION:Long-term ICL V4c implantation is safe,effective,and stable for correcting moderate and to high myopia,and the visual quality with patients is excellent and satisfactory,but the progression of axial length still needs attention after surgery.

A 3-month comparison study of subjective and objective visual quality of small incision lenticule extraction and transepithelial photorefractive keratectomy in patients with low and moderate myopia

AIM:To compare the subjective and objective visual quality between small incision lenticule extraction(SMILE)and transepithelial photorefractive keratectomy(t PRK)in patients with low and moderate myopia.METHODS:Patients undertaking SMILE or t PRK for the correction of low and moderate myopia were consecutively recruited in this prospective cohort study with a 3-month follow-up period.Objective evaluation[visual acuity test,manifest refraction,wavefront aberrations,the total cut-off value of the total modulation transfer function(MTFcut-off),and Strehl ratio(SR)]and subjective evaluation of visual quality(quality-of-life questionnaire)were conducted before surgery and at days 1,7,30,and 90 after surgery.RESULTS:A total of 47 patients(94 eyes)with SMILE and 22 patients(22 eyes)with t PRK were enrolled.The uncorrected visual acuity(UCVA)was better in SMILE patients on day 7 after surgery(1.13±0.13 vs 0.99±0.17,t=4.85,P<0.001)but was comparable at days 30 and 90.At day 90,the SMILE group had a lower spherical equivalent(SE)than the t PRK group(0.04±0.31 vs 0.19±0.43,t=2.08,P=0.042).Total higher order aberrations(HOAs)were induced in both surgical types,which were more evident in the t PRK group with 3-mm pupil diameter(0.16±0.07 vs0.11±0.05,t=4.27,P<0.001)and 5-mm pupil diameter(0.39±0.17 vs 0.36±0.11,t=2.33,P=0.022).The MTFcut-offand SR showed a trend of improvement in both SMILE and t PRK patients but were statistically better in the SMILE group with both pupil diameters.There was a significant improvement of contrast sensitivity(CS)over baseline levels at the spatial frequency of 18 cycles/degree(c/d)in the SMILE group(F=2.72,P=0.033)and at 3 c/d(F=3.03,P=0.031),12 c/d(F=3.72,P=0.013),and 18 c/d(F=4.62,P=0.004)in the t PRK group.The subjective quality of life questionnaire showed a steady improvement in the SMILE group(F=8.31,P<0.001)but not the t PRK group.CONCLUSION:SMILE and t PRK are both safe and effective ways to correct low and moderate myopia.A generally better and quicker recovery of visual quality favors the application of SMILE in qualified patients.

Clinicopathologic Correlation: Firm Mass on the Lateral Aspect of the Posterior Maxilla

We present the case of a 45-year-old Hispanic female with a slowly enlarging mass on her left maxilla in the region of teeth #15 and #16. A differential diagnosis is presented along with the histologic findings and treatment rendered. The prognosis and biology of the lesion are discussed.

Axial length,vitreoretinal pathology,and anterior chamber depth can predict postoperative refractive outcomes in phacovitrectomy/silicone oil removal

AIM:To evaluate the postoperative refractive prediction error(PE)and determine the factors that af fect the refractive outcomes of combined pars plana vitrectomy(PPV)or silicone oil removal(SOR)with cataract surgery.METHODS:The study is a retrospective,case-series study.Totally 301 eyes of 301 patients undergoing combined PPV/SOR with cataract surgery were enrolled.Eligible individuals were separated into four groups according to their preoperative diagnoses:silicone oil-filled eyes after PPV(group 1),epiretinal membrane(group 2),macular hole(group 3),and primary retinal detachment(RD;group 4).The variables af fecting postoperative refractive outcomes were analyzed,including age,gender,preoperative best-corrected visual acuity(BCVA),axial length(AL),keratometry average,anterior chamber depth(ACD),intraocular tamponade,and vitreoretinal pathology.The outcome measurements include the mean refractive PE and the proportions of eyes with a PE within±0.50 diopter(D)and±1.00 D.RESULTS:For all patients,the mean PE was-0.04±1.17 D,and 50.17%of patients(eyes)had a PE within±0.50 D.There was a significant difference in refractive outcomes among the four groups(P=0.028),with RD(group 4)showing the least favorable refractive outcome.In multivariate regression analysis,only AL,vitreoretinal pathology,and ACD were strongly associated with PE(all P<0.01).Univariate analysis revealed that longer eyes(AL>26 mm)and a deeper ACD were correlated with hyperopic PE,and shorter eyes(AL<26 mm)and a shallower ACD were correlated with myopic PE.CONCLUSION:RD patients have the least favorable refractive outcome.AL,vitreoretinal pathology,and ACD are strongly associated with PE in the combined surgery.These three factors affect refractive outcomes and thus can be used to predict a better postoperative refractive outcome in clinical practice.