Irregular Astigmatism Management Using SPOT Scleral Lenses in the Treatment of Corneal Ectasia and Penetrating Keratoplasty

Purpose: To evaluate the outcome of SPOT scleral lenses in the management of irregular astigmatism in patients with corneal ectasia and penetrating keratoplasty. Second, we analyzed patients' characteristics and tolerance, comfort, and geometries of fitted lenses. Method: Over a 5-year period, we included patients experiencing irregular astigmatism fitted with SPOT scleral contact lenses, from the University Hospital of Clermont-Ferrand, France. Data collected included corneal diseases, refractive error, best-corrected visual acuity (VA) with SPOT lenses, geometry of the lens, number of adjustment consultations, and the duration of follow-up. Comfort, quality of vision, less handling, and satisfaction were evaluated using visual analog scales after a 6-month follow-up period. Results: Sixty-five patients were included, analyzing 107 eyes. Eighty percent of patients still daily wore lenses after a follow-up of 22.3 +/- 13.8 months. Visual acuity improved by 0.47 +/- 0.51 logarithm of the minimum angle of resolution (average increase of 5 lines) (P<0.001) after wearing scleral lenses. Comfort, quality of vision, less handling, and satisfaction of contact lenses were excellent (>75/100). Contact lenses were daily worn 10.0 +/- 4.1 hr/day. Most patients wore size M (17 mm) lenses (53.3% of patients), with an average sagittal height of 5.2 +/- 1.2 mm. Internal toricity was used in 30% of cases. Best geometry was found after 2.69 +/- 0.87 consultations. Conclusion: SPOT scleral contact lenses are an effective and well tolerated method to improve the VA of patients with irregular astigmatism.