QUANTITATIVE MEASUREMENT OF CORNEAL HAZE AFTER MYOPIC PRK

OBJECTIVE: To design and evaluate an instrument for the objective meas urement of haze in rabbits after myopic PRK. METHODS: A circular fluor escent lamp bulb projected light onto the cornea through a circular co llimating aperture covered with an orange filter. The image was collec ted on a centrally mounted CCD camera and the profile of the haze circ le along its horizontal diameter determined. RESULTS: Haze circles wer e observed and quantitated, In the first weeks, they were donut-shaped , frequently with a central bright area, but later they became square- topped, The instrument reproduced measurements with an error of a few percentage points and showed good long-term stability.