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. Author manuscript; available in PMC: 2023 Nov 10.
Published in final edited form as: J Neuroophthalmol. 2020 Jun;40(2):148–156. doi: 10.1097/WNO.0000000000000821

FIG. 5.

FIG. 5.

Binocular summation in healthy children using (A) ETDRS, (B) 2.5% contrast, and (C) 1.25% contrast charts. The magnitude of binocular summation does not significantly vary by age using HCVA (P = 0.96) or LCLA (P = 0.23 for 2.5% charts and P = 0.19 for 1.25% charts). HCVA, high-contrast visual acuity; LCLA, low-contrast letter acuity.