The importance of rates in glaucoma.

dex lysis ly to ract nent tion, ome to ated es a s and s as a p able r loss. E tial r to be m field. issue o ning c ssion o te of g tant o ical t ion G n S nt S erw ause p f c coma T ded o d e to p f the a form e is s f the p ahd trong p t a sed to e sion w be c ical p this t the a ent N THIS ISSUE, BENGTSSON AND HEIJL DESCRIBE A TEC nique to measure the rate of visual field deterioratio glaucoma. The approach is designed to be sensitive he effects of spatially distinct defects such as those ca y glaucoma in its early to moderate stages and t elatively insensitive to the more diffuse depression cau y progressive cataract. The technique relies heavily he pattern deviation analysis of the Humphrey perim Humphrey Instruments, San Leandro, California, USA well-established and valid approach to detect local isual field abnormalities. 2