A 49-year-old man with a benign type of cystinosis exhibited crystalline deposits limited to the cornea and conjunctiva of both eyes. These deposits could be identified as cystine by histological, chromatographic, and roentgenographic methods. The patient also suffered from syringomyelia. A lamellar keratoplasty on the left, formerly injured eye has been kept clear for 17 months and shows practically no cystine deposits. Similar eye alterations in other members of the family could be excluded.
Kraus E, Lutz P. Ocular Cystine Deposits in an Adult. Arch Ophthalmol. 1971;85(6):690-694. doi:10.1001/archopht.1971.00990050692007