Further studies on allopurinol therapy and human cataractogenesis

S. Lerman, J. Megaw, F. T. Fraunfelder

Research output: Contribution to journalArticle

25 Scopus citations


We examined 11 cataractous lenses (or aspirated lens matter from extracapsular extractions) from patients ranging in age from 55 to 84 years who used allopurinol on a long-term basis (more than two years). Phosphorescence analyses demonstrated the characteristic allopurinol triplet in these lenses. When we analyzed normal lenses from patients taking allopurinol in a similar manner we found no evidence of allopurinol photobinding. These data indicated that allopurinol has a cataractogenic action only in patients in whom the drug has become photobound within the lens. Long-term allopurinol therapy does not necessarily cause or enhance cataracts in all patients. There may be a relationship between ultraviolet radiation exposure and circulating allopurinol levels (and perhaps renal function) in the genesis of photosensitized allopurinol cataracts.

Original languageEnglish (US)
Pages (from-to)205-209
Number of pages5
JournalAmerican journal of ophthalmology
Issue number2
StatePublished - Jan 1 1984

ASJC Scopus subject areas

  • Ophthalmology

Fingerprint Dive into the research topics of 'Further studies on allopurinol therapy and human cataractogenesis'. Together they form a unique fingerprint.

  • Cite this