Table 1.

Definition of the best-seeing eye, the worse-seeing eye, and equal vision described by Bressler et al

	Better-seeing eye	Worse-seeing eye	Equal vision
Baseline VA letter score in both eyes is ≥50 (20/100)	Baseline VA of the study eye is better than that of the fellow eye by ≥5 letters	Baseline VA of the study eye is worse than that of the fellow eye by ≥5 letters	Baseline VA of the study eye is within ±4 letters of that of the fellow eye
Baseline VA letter score in one or both eyes is <50 (20/100)	Baseline VA of the study eye is better than that of the fellow eye by ≥10 letters	Baseline VA of the study eye is worse than that of the fellow eye by ≥10 letters	Baseline VA of the study eye is within ±9 letters of that of the fellow eye

Note: Reprinted from Ophthalmology 2010;117, Bressler NM, Chang TS, Suner IJ, et al, Vision-related function after ranibizumab treatment by better- or worse-seeing eye: clinical trial results from MARINA and ANCHOR, 747–756. Copyright ©2010 with permission from Elsevier.⁹

Abbreviation: VA, visual acuity.