[Topographic stereoscopic measurements of optic disc in early XXXX ].

@entity1 @entity725 @entity2790
OBJECTIVE: To search a sensitive parameter for the early diagnosis of @entity725 ( @entity725 ). METHOD: A system of computerized image analysis was used to acquire images of the optic nerve head of @entity1 with @entity725 , @entity2790 ( @entity2790 ) and of normal @entity1 . Each of these groups contained 31 eyes of 31 cases. The mean relative depths of disc rim and cup at different areas in the optic nerve head were measured. All these @entity1 were followed up for four to six months, and the changes of the mean depths of every sector were compared between each pair of the three groups with statistic analysis. RESULTS: The mean depth of the neural rim and cup of each sector and that of total rim and total cup of @entity725 and @entity2790 @entity1 were all deeper than that of normal controls. The mean depths of neural rim of the superior sector, inferior sector and the total rim area of @entity725 were deeper than that of @entity2790 @entity1 . Compared to their first measurements, the changes of mean depths of neural rim of superior sector and total neural rim area of @entity725 @entity1 were more prominent than that of normal controls and @entity2790 . We also compared the relative depth of the total rim area in the different areas in the optic nerve head with other two dimensional optic disc parameters such as cup/disc ratio, etc. CONCLUSION: Our study suggests that three-dimensional stereoscopic measurement of the surface of optic nerve head and follow-up be of paramount importance in the early diagnosis of @entity725 @entity1 .
