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Archivos de la Sociedad Española de Oftalmología
Print version ISSN 0365-6691
Abstract
GALINDO-FERREIRO, A.; GALINDO-ALONSO, J.; SANCHEZ-TOCINO, H. and PALENCIA-ERCILLA, J.. Contact lens fitting in 133 eyes with irregular astigmatism. Arch Soc Esp Oftalmol [online]. 2007, vol.82, n.12, pp.747-751. ISSN 0365-6691.
Purpose: To study the adaptation of contact lens in a sample of 133 eyes with irregular astigmatism. Methods: A retrospective study was made in 133 eyes with irregular astigmatism. The selection criterion was to obtain a sample population with irregular astigmatism that was unlikely to be corrected with spectacles or conventional contact lens. A complete ophthalmologic exploration which included a topography with the Eye-Sys 2000 corneal topographer was made was made. The variables analyzed in the study were: refraction, visual acuity before and after the correction, cause of the astigmatism and contact lens used. Results: An equal number of women and men were enrolled in the study. The right eye was studied in 52% of cases, and the left eye in 46%. Both eyes were affected in 67% of the subjects. The reason for the astigmatism was keratoconus in 110 eyes (78.2%), and there were 4 corneal injuries, 9 ocular infections, and 6 idiopathic astigmatisms. Among the contact lens used in the study: in 103 eyes a hybrid lens (Softperm®) was adapted, in 20 eyes a piggy-back system, in 5 eyes a thick hydrophilic lens (Queratosoft®), in 4 eyes a hydrophilic contact lens and in 3 cases a rigid gas permeable contact lens. The average visual acuity before the adaptation was 0.28 (SD 0.24) (range 0.1-0.8). After the use of the lens the average visual acuity was 0.81 (SD 0.23) (range 0.1-1). Statistically significant differences between the visual acuity before and after treatment were found, with an improvement of 0.53 (SD 0.28) obtained. Conclusion: Only with experience using a large variety of non-conventional contact lens can a specialist contact lens ophthalmologist achieve a good result.
Keywords : Irregular astigmatism; keratoconus; contact lens; hybrid lens; piggy-back system.
