Fig. 2

Data summary from LEA SYMBOLS low-contrast sensitivity test. A When calculating the total number of successes to discriminate symbols (25 maximum) for each of the three viewing distances (1, 3, and 5 m), significant reductions in scores from the KCNMA1^−/+ subject were observed at 3 m and 5 m. B Summary data table for LEA SYMBOLS low-contrast sensitivity test. C Although no difference was observed at 1 m of distance, D the KCNMA1^−/+ subject exhibited significantly lower contrast sensitivity compared with published data for healthy volunteers [12] at nominal contrast values of < 5% for 3 m of distance and E no response at all at 5 m of distance