RBP3 and cerebrotendinous xanthomatosis: From the complex and syndromic cases (n = 22), bilateral cataracts were the presenting feature in 27.3% (6/22) patients—two with retinal dystrophies (one unsolved individual and one with RBP3-related retinitis pigmentosa 66) and four syndromic cataracts (three individuals with CRYAB associated myopathy and one with CTX).