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Proceedings Paper

Application of the holmium:YAG laser for refractive surgery III
Author(s): Vance M. Thompson; Theo Seiler; Alex C. Sacharoff; Daniel S. Durrie; Alberto J. Aran; Ronald W. Barnet; David D. Dulaney; Art C. Hurt; P. Michael Mann; Harold Sawelson; Myron Yanoff; David F. Muller
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Paper Abstract

We update the continued progress of laser thermokeratoplasty (LTK) clinical trials being conducted in the U.S. for the treatment of hyperopia and hyperopic astigmatism. Data from the Phase II hyperopia investigations on 25 patients and from Phase I astigmatism trials on 30 patients is reviewed. From the hyperopia Phase IIa study, the near uncorrected visual acuity of 13 patients for whom complete follow-up results are available at 1 year shows that all 13 patients gained 2 or more lines of visual acuity (Ave. gain 3.5 lines), which indicates a significant improvement in near vision. A survey given to these hyperopia patients finds 8% could read without glasses preoperatively versus 58.3% at 1 year post-operatively. The preoperative uncorrected visual acuity of those patients treated for astigmatism in the Phase I trial showed 2 out of 30 patients or 6.7% seeing better than 20/40 versus 10 out of 27 patients or 37% at one year post-op. The one year data in both studies indicates that after an initial period of partial regression of effect, the residual correction remains relatively stable between 6 months and 1 year. Continued follow-up will be carried out to see if the corrections remain stable beyond 1 year.

Paper Details

Date Published: 23 June 1994
PDF: 6 pages
Proc. SPIE 2126, Ophthalmic Technologies IV, (23 June 1994); doi: 10.1117/12.178576
Show Author Affiliations
Vance M. Thompson, Ophthalmology Ltd./Sioux Empire Medical Ctr. (United States)
Theo Seiler, Univ.-Augenklinik (United States)
Alex C. Sacharoff, Summit Technology, Inc. (United States)
Daniel S. Durrie, Hunkeler Eye Clinic (United States)
Alberto J. Aran, Aran and Holbrook Eye Associates (United States)
Ronald W. Barnet, Barnet Dulaney Eye Ctr. (United States)
David D. Dulaney, Barnet Dulaney Eye Ctr. (United States)
Art C. Hurt, Consultant (United States)
P. Michael Mann, Mann Eye Clinic (United States)
Harold Sawelson, Sawelson Eye Ctr. (United States)
Myron Yanoff, Hahnenmann Univ. (United States)
David F. Muller, Summit Technology, Inc. (United States)


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

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