| Gene | Description | Location | Gene Omim Number | Disease Omim Number |
| RAI | RETINOIC ACID-INDUCED GENE 1; RAI1 | 17p11.2 | 607642 | 182290 |
| RAI1 | RETINOIC ACID-INDUCED GENE 1; RAI1 | 17p11.2 | 607642 | 607642 |
| RECQL3 | RECQ PROTEIN-LIKE 3; RECQL3 | 15q26.1 | 604610 | 210900 |
| RET | REARRANGED DURING TRANSFECTION PROTOONCOGENE; RET | 10q11.2 | 164761 | 164761 |
| RHO | RHODOPSIN; RHO | 3q21-q24 | 180380 | 180380 |
| RP1 | RP1 GENE; RP1 | 8q11-q13 | 603937 | 603937 |
| RYR1 | RYANODINE RECEPTOR 1; RYR1 | 19q13.2 | 180901 | 180901 |