Table 3.
Comparison of Mean Visual Acuity and Mean Total Atrophic Area
| Mean Snellen Visual Acuity (Logarithm of the Minimum Angle of Resolution)* |
Mean Total Atrophic Area, mm2 (Macular Photocoagulation Study Disc Areas) |
|
|---|---|---|
| All study eyes | 20/60 (0.48) | 10.4 (4.1) |
| Bilateral GA, all eyes | 20/85 (0.63) | 11.8 (4.6) |
| Bilateral GA, better-seeing eye | 20/60 (0.47) | 11.7 (4.6) |
| GA eyes with fellow CNV eye | 20/63 (0.50) | 10.1 (4.0) |
| GA eyes with fellow drusen eye | 20/65 (0.51) | 4.2 (1.6)† |
CNV = choroidal neovascularization; GA = geographic atrophy; MPS = Macular Photocoagulation Study.
Study eye means 1 eye with GA per patient as described in “Patients and Methods.” One MPS disc area = 2.54 mm2 on the retina.
*
No significant difference among the groups in mean acuity.
†
The mean area is smaller for the fellow drusen eye group than for either of the other groups.