Share Email Print
cover

Proceedings Paper

Objective measurements of haze following phototherapeutic excimer laser ablation of cornea
Author(s): Russell L. McCally; Patrick J. Connolly; Sandeep Jain; Dimitri T. Azar
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We report on the use of a recently developed scatterometer to make objective measurements of haze that develops following excimer laser ablation of cornea. Phototherapeutic keratectomies (PTK), 6.0 mm dia, 0.25 mm transition zone, 150 micrometers stromal depth, were done on 4 pigmented rabbits using the VISX Model 20/20 laser system. Scatterometer measurements were made on the normal cornea prior to ablation and at various times up to 125 days postablation and are compared to slit-lamp photographs. Scattering from 3 of the eyes exhibited nearly identical behavior, peaking 20-25 days after treatment at 10 to 12 times the preablation level and then diminishing slowly. Scattering from the fourth eye peaked 14 days after treatment at 28 times the preablation level and remained well above the level of the other three eyes throughout the experimental period. These results suggest that identical PTK treatments can lead to different degrees of subepithelial haze.

Paper Details

Date Published: 23 June 1994
PDF: 5 pages
Proc. SPIE 2126, Ophthalmic Technologies IV, (23 June 1994); doi: 10.1117/12.178552
Show Author Affiliations
Russell L. McCally, Johns Hopkins Univ. and Wilmer Eye Institute/Johns Hopkins Univ. School of Medicine (United States)
Patrick J. Connolly, Wilmer Eye Institute/Johns Hopkins Univ. School of Medicine (United States)
Sandeep Jain, Wilmer Eye Institute/Johns Hopkins Univ. School of Medicine (United States)
Dimitri T. Azar, Wilmer Eye Institute/Johns Hopkins Univ. School of Medicine (United States)


Published in SPIE Proceedings Vol. 2126:
Ophthalmic Technologies IV
Jean-Marie A. Parel; Qiushi Ren, Editor(s)

© SPIE. Terms of Use
Back to Top