Figure 3

Change in lines from uncorrected visual acuity (UCVA) to best-corrected visual acuity (BCVA) in the better-seeing eye. Stacked bars show the distribution of eyes with lack of visual impairment (20/20; 20/25 and 20/32 visual acuities); eyes with refractive error only as the principal cause of visual impairment (includes only eyes improving to ≥20/32 with subjective refraction) and eyes with other causes as principal cause of visual impairment.