Table 1.
Participant Demographics by Site
| Site |
Number of Participants (Females; Males) |
Range of Ages, Years (Median) |
Range of Visual Acuities (Snellen)a |
Range of Visual Acuities, Snellen Equivalent logMAR (Median) |
| A | 10 (5; 5) | 10 to 70 (16.5) | 20/32 to 20/320 | 0.20 to 1.20 (0.45) |
| B | 10 (5; 5) | 14 to 52 (30.5) | 20/20 to count fingersd | 0.0 to 1.85 (0.3) |
| C | 9 (9; 0) | 7 to 39 (18) | 20/19 to 20/46 | −0.02 to 0.36 (0.1) |
a
The visual acuity values for the participants at site B were taken from the charts, not measured at the study visits. Visual acuities for the participants at the other two sites were measured at their first study visit.
b
USH II, Usher syndrome II; CRD, cone-rod dystrophy; LCA, Leber congenital amaurosis; RP, retinitis pigmentosa. Where known, the LCA gene mutation has been noted: RDH12, retinol dehydrogenase 12; CRB1, Crumbs 1.
c
Perimetry targets used in addition to the V4e target.
d
The conversion to logMAR for count fingers was based on Schulze-Bonsel et al.22