Quantitative visual field and optic disc correlates early in glaucoma
W. M. Hart Jr, M. Yablonski, M. A. Kass and B. Becker
A retrospective study was made of persons with ocular hypertension and
normal initial visual fields. Seventy eyes were followed, and glaucomatous
visual field defects developed in 25 of these eyes. In eyes with ocular
hypertensio, the area enclosed by the central visual field isopter (I2e)
was significantly smaller than that previously reported for an
age-corrected group of eyes with normal intraocular pressure. In the
absence of glaucomatous visual field defects, isopter areas were not
releated to cup-disc ratios. Coincident with visual field loss, reductions
in both peripheral (I4e) and central (I2e) isopter areas correlated
linearly with increases in the cup-disc ratio. Prior to visual field loss,
the I4e isopter area wassignificantly smaller among those eyes destined to
lose visual field.
