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Eric Kawulok, Muriel Schornack; Baseline Corneal Parameters in Patients Fit with Scleral Lenses for Ocular Surface Disease. Invest. Ophthalmol. Vis. Sci. 2018;59(9):1773.
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© ARVO (1962-2015); The Authors (2016-present)
Scleral lenses are increasingly being used to manage ocular surface disease. The diagnostic fitting process can be time-consuming. This retrospective study will identify baseline corneal parameters from Scheimpflug images acquired using Pentacam (Oculus, Inc., Wetzlar, Germany) prior to a scleral contact lens fit and the final Custom Stable (ValleyContax, Springfield, OR) scleral lens parameters for patients with ocular surface disease.
Retrospective chart review identified patients who have been fit with Custom Stable scleral lenses in one clinic over the past 20 months for whom Pentacam images were obtained prior to lens fitting. The following information was collected from the patient’s medical record: age of patient at time of initial contact lens fit, gender, scleral lens fit indication, lens diameter, base curve, and final prescribed scleral lens sagittal depth. Data collected from baseline Pentacam images included: anterior chamber angle, anterior chamber depth, corneal volume, corneal elevation, best fit sphere, and corneal thickness.
Six patients met inclusion criteria. The mean age was 61.7 (+/-11.29) years with a range of 46-75 years. The patients were categorized into four indications: Sjögren’s syndrome (1 patient); ocular cicatricial pemphigoid (1 patient); ocular graft vs. host disease (1 patient); and undifferentiated dry eye syndrome (3 patients). Mean sagittal depth of prescribed scleral lenses were 4380.9 (+/-156.38) microns with a range of 4190-4720 microns. The average diameter of the lens was 15.6 (+/-0.4) mm with a range of 14.8-15.8 mm. Average base curve for the final lens was 8.0 (+/-0.39) mm with a range of 7.2-8.3 mm. The best fit sphere mean was 7.50 (+/-0.34) mm with a range 7.1-8.1 mm. The mean anterior chamber angle measured 35.5 (+/-8.0) degrees with a range of 26.8-48.1 degrees. The mean anterior chamber depth was 3.7 (+/- 0.96) mm with a range of 2.5-5.4 mm. The mean corneal thickness was 549.4 (+/-24.42) microns with a range of 498-577 microns. The mean corneal volume was 63.5 (+/-2.77) mm3 with a range of 57.4-66.1 mm3. Finally, the corneal elevation mean was 3542.7 (+/-537.44) microns with a range of 2720-4370 microns.
Certain Pentacam imaging parameters for ocular surface disease patients may help guide the fit of scleral contact lenses. There were many limitations to the study.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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