A simple, noninvasive method ofin vivoprecorneal tear film stability analysis is described. The method involves observing the first catoptric (first Purkinje) image. The effect of fluorescein on the results and the relation with standard tear breakup time (BUT) are presented.
Received August 31, 1984; revision received November 21, 1984.* B.Sc. (Hons).
Glasgow College of Technology
Glasgow, Scotland G4 OB4
© 1985 American Academy of Optometry