Tear film profile in Graves' ophthalmopathy.

Tear film profile was studied in 30 patients with Graves' ophthalmopathy. Tear film pH, fluorescein staining, marginal tear strip and Schimer test values in patients with Graves' ophthalmopathy were comparable with controls, indicating normal tear secretion. Tear film break-up-time (BUT) in late Graves' ophthalmopathy was significantly low suggesting unstable tear film. Rose bengal as well as lissamine green staining intensity scores were significantly high, indicating presence of drying epithelial cells in early as well as late Graves' ophthalmopathy patients.