Is intraoperative topography predictive of postoperative topographical changes following refractive surgery?

Ömür Ö Uçakhan, Gary J. Sternberg, Jason Sokol, Scott E. Brodie, Penny Asbell

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose: To evaluate the usefulness of measuring corneal topography intraoperatively by Intraoperative PAR Corneal Topography System (IOPAR CTS) to predict the postoperative topographical changes in patients undergoing refractive surgery. Methods: Topographical measurements of 9 eyes of 9 patients were taken by IOPAR CTS: 6 immediately after Intrastromal Corneal Ring Segments (ICRS®) placement surgery and 3 immediately after Photorefractive Keratectomy (PRK) surgery. The topographical images taken by IOPAR CTS were analyzed to determine the quality of the image produced and the correlation of the keratometric data from the central 3 mm of cornea with measurements taken from an autokeratometer (Auto-Km) and the EyeSys Corneal Analysis System (CAS) for the same eyes taken three months following the procedure. Results: At the 3-month postoperative exam, the correlation coefficients for flat (K1), steep (K2), and average keratometry (AK) readings produced by the Auto-Km and the EyeSys CAS were quite high. However, the correlation coefficients for K1, K2, AK, As or steep meridian axis (Ax) readings taken intraoperatively by IOPAR CTS were quite low when compared to the readings taken by either the Auto-Km or EyeSys CAS three months postoperatively. Conclusion: We found IOPAR CTS, relatively difficult to perform in the operating room during refractive surgical procedures and not useful clinically in predicting the postoperative topographical changes induced by ICRS® or PRK procedure. Further studies are required to establish the efficacy and reproducibility of the instrument.

Original languageEnglish (US)
Pages (from-to)97-101
Number of pages5
JournalCLAO Journal
Volume26
Issue number2
StatePublished - Apr 1 2000

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Corneal Topography
Refractive Surgical Procedures
Photorefractive Keratectomy
Reading
Meridians
Operating Rooms
Cornea

All Science Journal Classification (ASJC) codes

  • Ophthalmology

Cite this

Is intraoperative topography predictive of postoperative topographical changes following refractive surgery? / Uçakhan, Ömür Ö; Sternberg, Gary J.; Sokol, Jason; Brodie, Scott E.; Asbell, Penny.

In: CLAO Journal, Vol. 26, No. 2, 01.04.2000, p. 97-101.

Research output: Contribution to journalArticle

Uçakhan, ÖÖ, Sternberg, GJ, Sokol, J, Brodie, SE & Asbell, P 2000, 'Is intraoperative topography predictive of postoperative topographical changes following refractive surgery?', CLAO Journal, vol. 26, no. 2, pp. 97-101.
Uçakhan, Ömür Ö ; Sternberg, Gary J. ; Sokol, Jason ; Brodie, Scott E. ; Asbell, Penny. / Is intraoperative topography predictive of postoperative topographical changes following refractive surgery?. In: CLAO Journal. 2000 ; Vol. 26, No. 2. pp. 97-101.
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