Research Article
Volume 11 Issue 3 - 2020
Are Rigid Gas Permeable Lenses Still the 1st Line of Choice in Corneal Ectatic Diseases?
Canan Asli Utine1,2*, Ezgi Karataş1, Vildan Öztürk2 and Zeynep Özbek1
1Department of Ophthalmology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey
2Yeditepe University Eye Center, Istanbul, Turkey
*Corresponding Author:Canan Asli Utine, Associate Professor, Department of Ophthalmology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey.
Received: January 29, 2020; Published: February 26, 2020


Purpose: To retrospectively evaluate the long-term results of silicone hydrogel soft contact lens (Toris-K, SwissLens) fitting for the rehabilitation of various corneal ectasias. 

Methods: A total of 42 eyes of 27 patients that were fitted with Toris-K lenses and had at least 4-years of follow-up were included into this study. Thirty-six eyes were diagnosed with keratoconus, 3 had pellucid marginal degeneration, 3 had post-LASIK iatrogenic ectasia. Patients were analyzed in terms of visual gain, complications, tolerability and satisfaction with the prescribed lenses.

Results: Pre-lens uncorrected visual acuity (UCVA) was 0.17 ± 0.16 (range: 0.01 to 0.6) and best spectacle corrected visual acuity (BSCVA) was 0.54 ± 0.26 (range: 0.1 to 1.0) in Snellen lines with a mean spherical equivalent of -4.93 ± 4.15 D (range: -1.00 to -16.25). Twenty eyes were fitted with TorisK-K12, 22 eyes were fitted with TorisK-K34 lenses. Best lens corrected visual acuity (BLCVA) was 0.85 ± 0.21 (range: 0.3 - 1.0) (p < 0.05 for both UCVA and BSCVA before Toris-K). BLCVA was ≥ 0.8 in 31 eyes (73.8%). One patient reported halos and glare with Toris-K despite 1.0 BLCVA and the optical zones needed to be enlarged. Two of 3 previous rigid gas permeable (RGP) lens users (i.e. 4 of 5 eyes) reported better visual quality with their RGPs compared with the new fit. All new contact lens users were satisfied with the visual gain after Toris-K fit. During the follow-up, corneal transplantation was required in 1 eye and intracorneal ring segment implantation was recommended in 1 eye, due to unsatisfactory vision with Toris-K and RGP intolerance. Satisfactory visual gain and subjective assessment together with a good fit was still achieved in 36 of 42 eyes (85.71%) at the end of follow-up period. 

Conclusion: Toris-K lenses seem to be a good initial fit option for unprogressive corneal ectasias.

Keywords: Corneal Ectasia; Keratoconus; Toris-K; Soft Contact Lenses


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Citation: Canan Asli Utine., et al. “Are Rigid Gas Permeable Lenses Still the 1st Line of Choice in Corneal Ectatic Diseases?”. EC Ophthalmology 11.3 (2020): 01-08

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