Quantitative measurement of corneal haze after myopic PRK

J Refract Surg. Mar-Apr 1996;12(3):412-6.


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.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Cornea / pathology*
  • Fluorescence
  • Lasers, Excimer
  • Myopia / surgery*
  • Ophthalmology / instrumentation
  • Photorefractive Keratectomy*
  • Rabbits