Bevel toric multicurve rigid gas-permeable lens for keratoconus

Ryoji Yanai, Kiichi Ueda, Koh Hei Sonoda

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Purpose: To evaluate the efficacy and safety of Twinbel bevel toric, a newly designed rigid gas-permeable (RGP) lens with a toric bevel curvature, for keratoconus. Methods: A retrospective analysis of nine eyes of patients with keratoconus who had been wearing RGP contact lenses and were switched to Twinbel bevel toric at Yamaguchi University Hospital. Visual acuity and contrast sensitivity were measured under photopic conditions. Complaint symptoms were recorded as primary outcome measures at follow-up visits. Efficacy and safety were evaluated at 12 weeks after the switch to Twinbel bevel toric or later. Results: Five eyes (55.6 %) showed an improvement in visual acuity with Twinbel bevel toric compared with the previous lens, whereas four eyes (44.4 %) maintained the same visual acuity as before. The mean best corrected visual acuity ± SD with Twinbel bevel toric was 0.01 ± 0.40 logMAR, significantly better (P = 0.044, paired Student's t test) than that (0.23 ± 0.51 logMAR) with the previous lens. Contrast sensitivity and subjective complaint scores did not differ significantly between Twinbel bevel toric and the previous lens. No serious complications of Twinbel bevel toric wear were observed. Conclusions: Fitting of Twinbel bevel toric improved visual acuity in eyes affected by keratoconus, thus providing a viable alternative for management of such eyes.

Original languageEnglish
Pages (from-to)199-205
Number of pages7
JournalJapanese Journal of Ophthalmology
Volume57
Issue number2
DOIs
Publication statusPublished - Mar 1 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ophthalmology

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