Early Detection of Glaucoma with Retinal Nerve Fiber Layer Photograph

ABSTRACT

The purpose of this study was to evaluate the usefulness of retinal nerve fiber layer [RNFL] photography and Heidelberg Retina Tomograph [HRT, Heidelberg, Germany] in early detection of glaucoma. Among 2802 people who underwent routine health checkup at. Seoul National University Hospital from July I to Decernber 31, 1996, forty-nine persons were included whose IOP was above 21mmHg or cup/disc ratio was 0.5 or greater. RNFL photography, HRT and automated perimetry [Humphrey Field Analyzer, program C30-2] were performed. Twelve eyes were diagnosed as glaucoma and one sye as glaucoma suspect. Four eyes with glaucoma had RNFL defect with normal visual field and 7 eyes with glaucoma had both RNFL defect and glaucomatous visual field defect. Of 26 eyes suggested as glaucoma by FSM classification of HRT, only 8 eyes met the diagnostic cri-teria of glaucoma of this study. Among 21 eyes with decreased hump height in HRT only 7 eyes were diagnosed as glaucoma. RNFL photography increased the detection rate for glaucoma by 50% over that with visual field test. only. RNFL photography will be a valuable method for early detection of glaucorna while HRT may play a suppleinentary role.