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Wearing Time as a Measure of Success of Scleral Lenses for Patients With Irregular Astigmatism

Ortenberg, Ilya M.Opt.; Behrman, Shmuel B.Sc., F.B.C.O.; Geraisy, Wasim M.Opt.; Barequet, Irina S. M.D.

Eye & Contact Lens: Science & Clinical Practice: November 2013 - Volume 39 - Issue 6 - p 381–384
doi: 10.1097/ICL.0b013e31829e8faa
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Objectives: To evaluate the visual correction and clinical performance with scleral contact lenses (CL) for the visual rehabilitation of irregular astigmatism and to report the effect of brief wearing breaks on the wearing time and success rate.

Methods: A retrospective review was performed on consecutive patients who were fitted with scleral CL because of irregular astigmatism following failure of other optical corrections. Visual acuity (VA) and wearing times were abstracted.

Results: The 97 consecutive identified patients (155 eyes) were divided according to the diagnosis: (1) keratoconus (105 eyes; 67.7%), (2) postpenetrating keratoplasty (PK) (28 eyes; 18.1%); (3) multiple diagnoses (22 eyes; 14.2%)—postradial keratotomy, keratoglobus, pellucid marginal degeneration, PK with aphakia, and iatrogenic ectasia. The mean follow-up was 34.9 ± 18.5 months (range, 2–71 months). There was a significant increase in best VA-scleral when compared with the previous best VA-prescleral (P<0.001). The best VA-scleral was similar in the 3 groups (P>0.5). Patients who took brief breaks every 4 to 5 continuous wearing hours had a significantly higher success rate (P<0.001) among all diagnosis groups. The success rate in wearing time in the keratoconus group was significantly higher than in the PK group (P<0.001). Twenty-six patients (27%) discontinued to wear scleral lenses.

Conclusion: Scleral lenses can be used successfully for visual rehabilitation and management of irregular astigmatism from various causative factors. The daily wearing time was significantly improved by taking brief breaks for replenishing the CL.

Microlens, Ltd., Practice (I.O., S.B., W.G.), Tel Aviv, Israel; and Goldschleger Eye Institute (I.S.B.), Sheba Medical Center, Tel-Aviv University Sackler School of Medicine, Tel-Hashomer, Israel.

Address correspondence and reprint requests to Irina S. Barequet, M.D., Goldschleger Eye Institute, Sheba Medical Center, Tel-Aviv University Sackler School of Medicine, Tel-Hashomer 52621, Israel; e-mail: ibarequet@hotmail.com

I.O. and W.G. are salaried employees of Microlens, Ltd., Practice, Tel Aviv, Israel (fixed salary, no financial or proprietary interest in Microlens, Ltd.). S.B. has financial interest in Microlens, Ltd., Practice. I.S.B. has no financial interest.

Accepted May 31, 2013

© 2013 Contact Lens Association of Ophthalmologists, Inc.