Topographic predicted corneal acuity with intrastromal corneal ring segments

Debby K. Holmes-Higgin, Terry E. Burris, Penny Asbell, Daniel S. Durrie, David J. Schanzlin

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

PURPOSE: To evaluate predicted optical quality of the central anterior corneal surface before and after the intrastromal corneal ring segment (ICRS) refractive procedure using a clinical videokeratoscope and software index developed for that purpose. METHODS: Predicted corneal acuity, a topographically derived index provided with the EyeSys System 2000 videokeratscope, representing potential optical quality of the cornea, was assessed preoperatively and at postoperative month 3 in 94 eyes that received an ICRS to treat -1.00 to -6.00 D of myopia. Predicted corneal acuity was calculated by determining the difference between a measured cornea and its best-fit ellipses for reflected ring circumferences within the central 3 mm diameter zone. RESULTS: Preoperative predicted corneal acuity was 20/10 in 92 of 94 eyes (98%). At month 3 after the ICRS procedure, 48 (51%) of moderately myopic eyes were corrected to 20/20 or better, 96% (90 eyes) were corrected to 20/40 or better, and 98% of eyes (92 eyes) had a predicted corneal acuity of 20/10. For the eyes with a predicted corneal acuity of 20/10, spectacle- corrected visual acuity was normally distributed between 20/10 and 20/25. CONCLUSION: Predicted corneal acuity did not change significantly from baseline in eyes with an ICRS. This suggests that topographic irregularities in the central 3 mm of the cornea detectable by predicted corneal acuity software were not induced in the central cornea with the ICRS.

Original languageEnglish (US)
Pages (from-to)324-330
Number of pages7
JournalJournal of Refractive Surgery
Volume15
Issue number3
StatePublished - May 1 1999

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Cornea
Software
Myopia
Visual Acuity

All Science Journal Classification (ASJC) codes

  • Surgery
  • Ophthalmology

Cite this

Holmes-Higgin, D. K., Burris, T. E., Asbell, P., Durrie, D. S., & Schanzlin, D. J. (1999). Topographic predicted corneal acuity with intrastromal corneal ring segments. Journal of Refractive Surgery, 15(3), 324-330.

Topographic predicted corneal acuity with intrastromal corneal ring segments. / Holmes-Higgin, Debby K.; Burris, Terry E.; Asbell, Penny; Durrie, Daniel S.; Schanzlin, David J.

In: Journal of Refractive Surgery, Vol. 15, No. 3, 01.05.1999, p. 324-330.

Research output: Contribution to journalArticle

Holmes-Higgin, DK, Burris, TE, Asbell, P, Durrie, DS & Schanzlin, DJ 1999, 'Topographic predicted corneal acuity with intrastromal corneal ring segments', Journal of Refractive Surgery, vol. 15, no. 3, pp. 324-330.
Holmes-Higgin DK, Burris TE, Asbell P, Durrie DS, Schanzlin DJ. Topographic predicted corneal acuity with intrastromal corneal ring segments. Journal of Refractive Surgery. 1999 May 1;15(3):324-330.
Holmes-Higgin, Debby K. ; Burris, Terry E. ; Asbell, Penny ; Durrie, Daniel S. ; Schanzlin, David J. / Topographic predicted corneal acuity with intrastromal corneal ring segments. In: Journal of Refractive Surgery. 1999 ; Vol. 15, No. 3. pp. 324-330.
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