Of these, 154 subjects met our inclusion criteria for the reference range (three testing errors or less and visual acuity 6/9 or better).
Membership requires corrected sight equal to or less than Snellen visual acuity 6/60 in the eye with better vision.
The vitreous level of vascular endothelial growth factor was significantly higher in patients who showed less improvement of visual acuity compared with those who had a better visual prognosis (p = 0.0135).
Kooner defined blindness as vision equal to 6/60 or less and/or a visual field less than 20°, whereas our definition considered blindness as visual acuity less than 3/60 and/or a visual field less than 10°.
Blindness is defined as visual acuity less than 3/60, or a corresponding visual field loss to less than 10 degrees in the better eye using best possible correction [ 6].
Low vision was defined as BCVA less than 20/60, but equal to or better than 20/400 in the better eye, and blindness was defined as visual acuity less than 20/400 in the better eye based on WHO criteria [ 22].
Low vision is defined as visual acuity less than 6/18, but equal to or better than 3/60, or a corresponding visual field loss to less than 20 degrees in the better eye using best possible correction.
Looks of disgust resulted in the greatest visual acuity – less light and better focus; fearful expressions induced maximum sensitivity – more light and a broader visual field.
METHODS: Eyes with visual acuity less than 20/30, corneal or retinal pathologic features, or unreliable standard automated perimetry (SAP) results were excluded.
Charts from patients with visual acuity less than 20/200 in their better eye (legal blindness) were selected for extensive chart review to determine the cause of visual loss and the antecedent process of care.
