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Glare disability in nephropathic cystinosis.
B Katz1, R B Melles, J A Schneider
1Department of Ophthalmology, University of California San Diego, La Jolla.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|December 1, 1987
Summary
Patients with infantile cystinosis experience glare disability due to cystine crystal buildup in the eyes. This visual impairment contributes to their reported photophobia and glare sensitivity.
Area of Science:
- Ophthalmology
- Metabolic Disorders
- Genetics
Background:
- Cystinosis is a rare lysosomal storage disease caused by impaired cystine transport.
- Cystine accumulation in ocular tissues is a hallmark of cystinosis.
- Patients often report photophobia and glare, but the specific visual dysfunction is not fully characterized.
Purpose of the Study:
- To quantify glare sensitivity in patients with infantile cystinosis.
- To compare glare disability in cystinosis patients to age-matched controls.
- To investigate the relationship between ocular cystine crystal deposition and glare disability.
Main Methods:
- Glare sensitivity was measured in 12 patients diagnosed with infantile cystinosis.
- Patient results were compared to an age-matched control group.
- Glare disability was assessed using standardized psychophysical testing.
Main Results:
- Ten out of 12 patients with infantile cystinosis exhibited significant glare disability compared to controls.
- Glare disability scores in the cystinosis cohort ranged from 5% to 50%.
- A correlation between cystine crystal accumulation and observed glare disability is suggested.
Conclusions:
- Infantile cystinosis patients demonstrate significant glare disability.
- Dazzle glare from cystine crystals likely contributes to visual complaints in cystinosis.
- Quantifying glare sensitivity is important for understanding visual dysfunction in cystinosis.