The effect of scleral lenses on vision, refraction and aberrations in post‐LASIK ectasia, keratoconus and pellucid marginal degeneration
| Autor: | Pooja Khamar, Stephen J. Vincent, Rohit Shetty, Vaitheeswaran Ganesan Lalgudi, Mukesh Kumar, David A. Atchison |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Keratoconus Visual acuity genetic structures Keratomileusis Laser In Situ Pellucid marginal degeneration Coma (optics) Refraction Ocular 03 medical and health sciences 0302 clinical medicine Scleral lens Ectasia Ophthalmology medicine Humans Post-LASIK ectasia business.industry Corneal Topography Contact Lenses Hydrophilic medicine.disease eye diseases Sensory Systems Contact lens 030221 ophthalmology & optometry sense organs medicine.symptom business 030217 neurology & neurosurgery Dilatation Pathologic Optometry |
| Zdroj: | Ophthalmic and Physiological Optics. 41:664-672 |
| ISSN: | 1475-1313 0275-5408 |
| DOI: | 10.1111/opo.12802 |
| Popis: | PURPOSE To quantify the effect of a single scleral lens design on visual acuity and ocular higher-order aberrations in eyes with post-LASIK ectasia, keratoconus and pellucid marginal degeneration (PMD) that could not achieve satisfactory vision with spectacles or soft contact lenses. METHODS Forty-six eyes of 28 participants fitted with diagnostic scleral lenses (KeraCare) were analysed, including 19, 15 and 12 eyes with post-LASIK ectasia, keratoconus and PMD, respectively. Corrected distance visual acuity (CDVA) and ocular aberrations were measured prior to lens wear and during lens wear after 60 min of settling. An i-Trace aberrometer was used to determine aberrations over a 4.5 mm diameter pupil. RESULTS Before lens wear, the median (95% confidence interval) values across all groups were: CDVA 0.30 (0.30, 0.40) logMAR, spherical equivalent refraction -2.75 (-5.25, -2.12) D, cylindrical refraction 3.75 (2.50, 5.00) D, higher-order-root-mean-square error (HO-RMS) 0.90 (0.64, 1.03) μm and vertical coma co-efficient C(3,-1) -0.32 (-0.42, -0.12) μm. RMS coma of 0.52 (0.40, 0.74) μm was higher for the keratoconus group than for the other groups (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|