tokens: Results In ten consanguineous families , a total of 10 homozygous mutations in 8 IRD genes were identified , including 2 novel mutations , c.1654_1655delAG ( p. R552Afs*5 ) in gene FAM161A in a patient diagnosed with retinitis pigmentosa , and c.830 T > C ( p. L277P ) in gene CEP78 in a patient diagnosed with cone and rod dystrophy .