Measurements in the Laser Irradiated Eye.
Abstract
The work involves the fabrication and use of a small fiber optic probe to measure (1) the transmission of the ocular media which is the ratio of the total light intensity reaching the retina to the total light intensity incident on the cornea, and (2) the cross-sectional intensity profile of a minimally small image. Information concerning the resolution of the eye is derived from the small image measurements. The transmission of the ocular media, measured on a limited number of animals, compares well with some of the best previously reported data. The transmission was measured via a 600 micron diameter fiber optic probe which collected all the light from a 200 micron diameter irrading laser beam. Three lasers, providing seven wavelengths, were employed. The minimal images measured in the monkey eye were larger than values reported from subjective acuity tests or by diffraction theory. Some of this poor quality could be attributed to experimental error, but perhaps the most significant factor affecting eye quality was the fact that the neural controls for blinking, tearing, and micro-accommodation, which aid the eye in forming a retinal image, were inactive in the anesthetized animal.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 15, 1978
- Accession Number
- ADA069842
Entities
People
- Ashley J. Welch
- Larry D. Forster
Organizations
- University of Texas at Austin