Quantitative measurement of corneal haze after myopic PRK.
OBJECTIVE
To design and evaluate an instrument for the objective measurement of haze in rabbits after myopic PRK.


METHODS
A circular fluorescent lamp bulb projected light onto the cornea through a circular collimating aperture covered with an orange filter. The image was collected on a centrally mounted CCD camera and the profile of the haze circle along its horizontal diameter determined.


RESULTS
Haze circles were 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.
Chang
S S
SS
Department of Ophthalmology, Stanford University Medical Center, Calif., USA.
Maurice
D M
DM
Ramirez-Florez
S
S
D000818:Animals; D003315:Cornea / Q000473:pathology*; D005453:Fluorescence; D054018:Lasers, Excimer; D009216:Myopia / Q000601:surgery*; D009885:Ophthalmology / Q000295:instrumentation; D018903:Photorefractive Keratectomy; D011817:Rabbits