AIM:To evaluate the changes in the anterior segment parameters of the subjects with primary angle closure suspect(PACS) before and after laser iridotomy(LI) using the Pentacam and gonioscopy. METHODS:Forty-eight eyes ...AIM:To evaluate the changes in the anterior segment parameters of the subjects with primary angle closure suspect(PACS) before and after laser iridotomy(LI) using the Pentacam and gonioscopy. METHODS:Forty-eight eyes of 48 PACS were included.Anterior chamber angle(ACA),central anterior chamber depth(ACD),anterior chamber volume(ACV) and central corneal thickness(CCT) were recorded from the Pentacam before and one month after LI.ACA was graded according to Shaffer classification using Goldmann gonioscopy.RESULTS:ACA increased significantly from 25.59±4.41 to 26.46±4.33 degrees(P=0.009) and ACV changed from 85.97±16.07mm3to 99.25±15.83mm3(P=0.000).The changes in ACD,CCT and intraocular pressure were non-significant(P】0.05).Gonioscopy showed significant widening of the Shaffer angle in 4 quadrants(P【0.001).CONCLUSION:Pentacam can serve as the objective instrument in assessing the efficacy of LI.展开更多
AIM:To explore the learning curve for ophthalmologists at the start of laser peripheral iridectomy(LPI)training.METHODS:The learning curve of 4 doctor groups without previous LPI experience was studied.Three main para...AIM:To explore the learning curve for ophthalmologists at the start of laser peripheral iridectomy(LPI)training.METHODS:The learning curve of 4 doctor groups without previous LPI experience was studied.Three main parameters of LPI were reviewed:total energy,argon energy and neodymium-doped yttrium aluminum garnet(Nd:YAG)energy.Procedures were evaluated in cohorts of 20 cases to identify the turning points of the three variables.RESULTS:There was no significant difference in terms of age or eye among the 4 doctor groups.There were stable trends on the learning curve for the Doctor A and C groups regarding total energy and argon energy.In addition,the turning points on the learning curve were determined after the 20th procedure for the Doctor B and D groups regarding total energy and argon energy.Moreover,the Nd:YAG energy was relatively stable since the first procedure.CONCLUSION:It requires approximately 20 procedures for a beginner to reach a turning point on the learning curve regarding LPI.It can serve as a point of reference or guideline for training beginners to perform LPI.展开更多
文摘AIM:To evaluate the changes in the anterior segment parameters of the subjects with primary angle closure suspect(PACS) before and after laser iridotomy(LI) using the Pentacam and gonioscopy. METHODS:Forty-eight eyes of 48 PACS were included.Anterior chamber angle(ACA),central anterior chamber depth(ACD),anterior chamber volume(ACV) and central corneal thickness(CCT) were recorded from the Pentacam before and one month after LI.ACA was graded according to Shaffer classification using Goldmann gonioscopy.RESULTS:ACA increased significantly from 25.59±4.41 to 26.46±4.33 degrees(P=0.009) and ACV changed from 85.97±16.07mm3to 99.25±15.83mm3(P=0.000).The changes in ACD,CCT and intraocular pressure were non-significant(P】0.05).Gonioscopy showed significant widening of the Shaffer angle in 4 quadrants(P【0.001).CONCLUSION:Pentacam can serve as the objective instrument in assessing the efficacy of LI.
基金Supported by the National Natural Science Foundation of China(No.81970808)Natural Science Foundation of Guangdong Province,China(No.2019A1515011196No.2020A1515010121)。
文摘AIM:To explore the learning curve for ophthalmologists at the start of laser peripheral iridectomy(LPI)training.METHODS:The learning curve of 4 doctor groups without previous LPI experience was studied.Three main parameters of LPI were reviewed:total energy,argon energy and neodymium-doped yttrium aluminum garnet(Nd:YAG)energy.Procedures were evaluated in cohorts of 20 cases to identify the turning points of the three variables.RESULTS:There was no significant difference in terms of age or eye among the 4 doctor groups.There were stable trends on the learning curve for the Doctor A and C groups regarding total energy and argon energy.In addition,the turning points on the learning curve were determined after the 20th procedure for the Doctor B and D groups regarding total energy and argon energy.Moreover,the Nd:YAG energy was relatively stable since the first procedure.CONCLUSION:It requires approximately 20 procedures for a beginner to reach a turning point on the learning curve regarding LPI.It can serve as a point of reference or guideline for training beginners to perform LPI.
