Fig. 2

Locally estimated scatterplot smoothing (LOESS) curves showing change in visual acuity and central subfield thickness (CST) over time in eyes of patients that were lost to follow-up grouped by follow-up time; 2 patients with central retinal vein occlusion dropped out between 3 and 6 months (a) while 10 did between 6 and 12 months (b). Of those with branch retinal vein occlusion, 5 patients dropped out between 3 and 6 months (c) and 19 between6 and 12 months (d). The shaded region indicates area of progressive decrease in the number of patients, resulting in increased volatility of LOESS predictions