摘要
Purpose To determine the effect of cataract on the results of frequency-doubl ing technology (FDT) perimetry. Design Consecutive cohort study. Participants Forty-four patients with normal ophtha lmic examinations, with the exception of cataract, scheduled to undergo phacoemu lsification and posterior chamber lens implantation were prospectively identifie d and completed the study. Methods All subjects underwent FDT perimetry using th e full-threshold C-20 strategy. Both eyes were tested within 1 month before ca taract surgery and up to 3 months after surgery. The unoperated fellow eyes serv ed as controls. Main outcome measures Changes in visual acuity (VA), mean deviat ion (MD), and pattern standard deviation (PSD) were evaluated. For each subject, the change in MD and PSD in the eye that underwent cataract surgery was adjuste d for change in the control eye that is thought to occur due to a learning effec t. Results Among the eyes that underwent cataract surgery, the median preoperati ve VA was 20/60 (range, 20/30-20/800) and the mean preoperative MD was -4.00± 3.72 decibels (dB). Postoperatively, the median VA improved to 20/30 (range, 20/ 20-20/70) and the mean postoperative MD was-0.26±3.09 dB (P< 0.001). Among th e control eyes, MDs were -1.74±3.71 dB preoperatively and-0.94±3.85 dB posto peratively (P=0.019). The adjusted improvement in MD among eyes that underwent c ataract surgery was 2.94±3.44 dB (P< 0.001). There was no significant change in PSD. Preoperative VA correlated significantly with preoperative MD (r= 0.39, P= 0.01). The improvement in VA correlated significantly with the adjusted improvem ent in MD (r=0.38, P=0.01). Conclusions Cataract has an adverse effect on the MD but not the PSD in FDT perimetry. Among eyes with visually significant cataract , the MD correlates significantly with VA. After cataract surgery, the change in VA correlates significantly with the adjusted change in MD.
Purpose To determine the effect of cataract on the results of frequency-doubl ing technology (FDT) perimetry. Design Consecutive cohort study. Participants Forty-four patients with normal ophtha lmic examinations, with the exception of cataract, scheduled to undergo phacoemu lsification and posterior chamber lens implantation were prospectively identifie d and completed the study. Methods All subjects underwent FDT perimetry using th e full-threshold C-20 strategy. Both eyes were tested within 1 month before ca taract surgery and up to 3 months after surgery. The unoperated fellow eyes serv ed as controls. Main outcome measures Changes in visual acuity (VA), mean deviat ion (MD), and pattern standard deviation (PSD) were evaluated. For each subject, the change in MD and PSD in the eye that underwent cataract surgery was adjuste d for change in the control eye that is thought to occur due to a learning effec t. Results Among the eyes that underwent cataract surgery, the median preoperati ve VA was 20/60 (range, 20/30-20/800) and the mean preoperative MD was -4.00± 3.72 decibels (dB). Postoperatively, the median VA improved to 20/30 (range, 20/ 20-20/70) and the mean postoperative MD was-0.26±3.09 dB (P< 0.001). Among th e control eyes, MDs were -1.74±3.71 dB preoperatively and-0.94±3.85 dB posto peratively (P=0.019). The adjusted improvement in MD among eyes that underwent c ataract surgery was 2.94±3.44 dB (P< 0.001). There was no significant change in PSD. Preoperative VA correlated significantly with preoperative MD (r= 0.39, P= 0.01). The improvement in VA correlated significantly with the adjusted improvem ent in MD (r=0.38, P=0.01). Conclusions Cataract has an adverse effect on the MD but not the PSD in FDT perimetry. Among eyes with visually significant cataract , the MD correlates significantly with VA. After cataract surgery, the change in VA correlates significantly with the adjusted change in MD.
出处
《世界核心医学期刊文摘（眼科学分册）》
2005年第2期59-60,共2页
Digest of the World Core Medical Journals:Ophthalmology
