Visual acuity is in Snellen decimals. Abbreviations are as follows: CF, counting finger; COD, cone dystrophy; CRD, cone-rod dystrophy; D, diopter; ERG, electroretinography; LE, left eye; NP, not performed; OCT, optical coherence tomography; RE, right eye; RPE, retinal pigment epithelium; and SE, spherical equivalent.