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Iris colour and the influence of local anaesthetics on pre‐corneal tear film stability
Author(s) -
Patel S.,
Laidlaw S.,
Mathewson L,
McCallum L,
Nicholson C.
Publication year - 1991
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1991.tb04833.x
Subject(s) - ophthalmology , iris (biosensor) , medicine , cornea , computer science , computer security , biometrics
Using non‐invasive methods we report here that the stability of the pre‐corneal tear film is lower in the brown eye than in the blue eye. The average stability in the blue eye is 15.8 sec (SD ± 5.8) and in the brown eye it is 12.3 sec (SD ± 2.9). On average, instillation of topical anaesthetics, benoxinate hydrochoride (0.4%) or amethacaine hydrochloride (0.5%), depress the stability of the pre‐corneal tear film in blue eyes but not in brown eyes.