Figure 4.

Rod-mediated temporal summation.

Notes: (A) t_CRIT values in former preterm subjects with a history of severe ROP, mild ROP, and no ROP and in term-born controls are plotted. Each point represents individual subjects; the number of subjects in each group is indicated. The horizontal bars indicate the mean t_CRIT value for each group. (B) As shown in the log–log plot, reciprocity held. In every subject group, for the brief duration stimuli, threshold became lower (more sensitive) with increasing stimulus duration. For longer duration stimuli, the threshold did not change; summation was complete. (A) Copyright © 2015. Association for Research in Vision and Ophthalmology. Adapted from Hansen RM, Moskowitz A, Tavormina JL, Bush JN, Soni G, Fulton AB. Temporal summation in children with a history of retinopathy of prematurity. Invest Ophthalmol Vis Sci. 2015;56(2):914–917.²⁶

Abbreviations: t_CRIT, critical duration; ROP, retinopathy of prematurity.