AIM：To determine the repeatability of Ophtha Top topography and assess the consistency with intraocular lens（IOL）-Master and Lenstar LS900（Lenstar）in measuring corneal parameters among cataract patients.METHODS：...AIM：To determine the repeatability of Ophtha Top topography and assess the consistency with intraocular lens（IOL）-Master and Lenstar LS900（Lenstar）in measuring corneal parameters among cataract patients.METHODS：Totally 125 eyes were enrolled.Corneas were successively measured with Ophtha Top,IOL-Master and Lenstar at least three times.The flattest meridian power（Kf）,the steepest meridian power（Ks）,mean power（Km）,J0 and J45 were recorded.Intra-class correlation coefficients（ICCs）,the coefficient of variance（COV）,within subject standard deviation（Sw）,and test-retest repeatability（2.77Sw）were adopted to determine the repeatability.The 95%limit of agreement（95%LOA）and Bland-Altman plots were used to assess comparability.RESULTS：Repeatability of Ophtha Top topography for measuring corneal parameters showed the ICCs were all above 0.93,2.77Sw was lower than 0.31,and the COV of the Kf and Ks was lower than 0.25.The keratometric readings with Ophtha Top topography were flatter than with the IOLMaster and Lenstar devices,while the Pearson correlation coefficients were over 0.97.The J0 and J45 with Ophtha Top topography were smaller compared with Lenstar and IOL-Master,while was comparable between Lenstar and IOL-Master.CONCLUSION：Ophtha Top topography shows excellent repeatability for measuring corneal parameters.However,differences between the Ophtha TOP topography and Lenstar,IOL-Master both in cornea curvature and the astigmatism should be noted clinically.展开更多
Congenital cataract occurs during infancy when the axial length and corneal and visual function are in the sensitive stages of rapid development..Inappropriate surgical intervention not only fails to restore visual fu...Congenital cataract occurs during infancy when the axial length and corneal and visual function are in the sensitive stages of rapid development..Inappropriate surgical intervention not only fails to restore visual function,.but also causes irreversible serious influences upon eyeball development in children diagnosed with congenital cataract. At present, the uncertainty of selection of intraocular lens(IOL) degrees during the eyeball development period is averted by using a main treatment of congenital cataract that includes two-stage surgery:.stage I cataract extraction and stage II IOL implantation. However, the accurate selection of a refractive correction method and the timing of IOL implantation during stage II surgery for aphakic eyes remains controversial following stage I cataract extraction..This review retrospectively summarizes the current progress and existing problems indicated by related recent studies focusing on refractive correction pattern and IOL implantation timing.展开更多
This study was designed to compare optical biometry measurements and predicted refraction in cataract patients with high myopia [axial length(AL) ≥26 mm] using OA-2000 and IOL Master 500. Ocular biometry measurements...This study was designed to compare optical biometry measurements and predicted refraction in cataract patients with high myopia [axial length(AL) ≥26 mm] using OA-2000 and IOL Master 500. Ocular biometry measurements were performed using both biometers before surgery. Uneventful cataract surgery was performed in all patients. Postoperative manifest refraction was obtained 3 wk after surgery or later. A total of 67 eyes were examined. The AL, keratometry(K), and anterior chamber depth(ACD) of the two biometers showed excellent agreement. Predicted errors were similar and a strong positive correlation was observed(r=0.909). Out of 21 eyes(31.34%) with unsuccessful AL readings using the IOL Master 500, 20 eyes of them could be measured using OA-2000. Therefore, the biometric parameters measured by the two biometers showed good agreement. However, OA-2000 had a lower AL measurement failure rate.展开更多
Twenty-five cases of posterior chamber IOL implantation intraumatic cataract with complications associated with primary injury werereported.The operating methods were described and the post-operative com-plications we...Twenty-five cases of posterior chamber IOL implantation intraumatic cataract with complications associated with primary injury werereported.The operating methods were described and the post-operative com-plications were discussed.Seventy-two percent of patients have the correctvision over 20/40.It is suggested that the posterior chamber IOL can be im-planted in traumatic cataract with some injured complications.EYE SCIENCE1992;8:111-112.展开更多
文摘AIM：To determine the repeatability of Ophtha Top topography and assess the consistency with intraocular lens（IOL）-Master and Lenstar LS900（Lenstar）in measuring corneal parameters among cataract patients.METHODS：Totally 125 eyes were enrolled.Corneas were successively measured with Ophtha Top,IOL-Master and Lenstar at least three times.The flattest meridian power（Kf）,the steepest meridian power（Ks）,mean power（Km）,J0 and J45 were recorded.Intra-class correlation coefficients（ICCs）,the coefficient of variance（COV）,within subject standard deviation（Sw）,and test-retest repeatability（2.77Sw）were adopted to determine the repeatability.The 95%limit of agreement（95%LOA）and Bland-Altman plots were used to assess comparability.RESULTS：Repeatability of Ophtha Top topography for measuring corneal parameters showed the ICCs were all above 0.93,2.77Sw was lower than 0.31,and the COV of the Kf and Ks was lower than 0.25.The keratometric readings with Ophtha Top topography were flatter than with the IOLMaster and Lenstar devices,while the Pearson correlation coefficients were over 0.97.The J0 and J45 with Ophtha Top topography were smaller compared with Lenstar and IOL-Master,while was comparable between Lenstar and IOL-Master.CONCLUSION：Ophtha Top topography shows excellent repeatability for measuring corneal parameters.However,differences between the Ophtha TOP topography and Lenstar,IOL-Master both in cornea curvature and the astigmatism should be noted clinically.
基金The Pearl River Science and Technology New Star(Grant No.2014J2200060)Project of Guangzhou City,the Guangdong Provincial Natural Science Foundation for Distinguished Young Scholars(Grant No.14050000151)the Cultivation Projects for Young Teaching Staff of Sun Yat-sen University(12ykpy61) from the Fundamental Research Fundsfor the Central Universities
文摘Congenital cataract occurs during infancy when the axial length and corneal and visual function are in the sensitive stages of rapid development..Inappropriate surgical intervention not only fails to restore visual function,.but also causes irreversible serious influences upon eyeball development in children diagnosed with congenital cataract. At present, the uncertainty of selection of intraocular lens(IOL) degrees during the eyeball development period is averted by using a main treatment of congenital cataract that includes two-stage surgery:.stage I cataract extraction and stage II IOL implantation. However, the accurate selection of a refractive correction method and the timing of IOL implantation during stage II surgery for aphakic eyes remains controversial following stage I cataract extraction..This review retrospectively summarizes the current progress and existing problems indicated by related recent studies focusing on refractive correction pattern and IOL implantation timing.
基金Supported by Natural Science Foundation of Guangdong Province (No.2015A030310504)Guangdong Medical Science and Technology Research Fund (No. B2018142)The Shantou City Science and Technology Project, China (No.170829211930487)
文摘This study was designed to compare optical biometry measurements and predicted refraction in cataract patients with high myopia [axial length(AL) ≥26 mm] using OA-2000 and IOL Master 500. Ocular biometry measurements were performed using both biometers before surgery. Uneventful cataract surgery was performed in all patients. Postoperative manifest refraction was obtained 3 wk after surgery or later. A total of 67 eyes were examined. The AL, keratometry(K), and anterior chamber depth(ACD) of the two biometers showed excellent agreement. Predicted errors were similar and a strong positive correlation was observed(r=0.909). Out of 21 eyes(31.34%) with unsuccessful AL readings using the IOL Master 500, 20 eyes of them could be measured using OA-2000. Therefore, the biometric parameters measured by the two biometers showed good agreement. However, OA-2000 had a lower AL measurement failure rate.
文摘Twenty-five cases of posterior chamber IOL implantation intraumatic cataract with complications associated with primary injury werereported.The operating methods were described and the post-operative com-plications were discussed.Seventy-two percent of patients have the correctvision over 20/40.It is suggested that the posterior chamber IOL can be im-planted in traumatic cataract with some injured complications.EYE SCIENCE1992;8:111-112.
