Crowding
NEAR VISION
The difference of near visual acuity between single optotypes and grouped optotypes was 1.0 log step (IQR 0.0–1.5) for group C and 1.5 log steps (IQR 1.2–1.9) for group DD. The difference between the groups of 0.5 log steps was statistically significant (U = 274.5, p = .012, Mann-Whitney U test). This group difference means half a line on the Oculus near vision chart, which cannot be considered clinically relevant in the cohort examined here. Comparing individuals, it was remarkable that we found a difference of > = 2 lines in only 1 child of group C, but in 5 children of group DD. However, we did not find any individual features in the children who showed a difference of > = 2 lines.