Title:
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Peripheral myopization and visual performance with experimental rigid gas permeable and soft contact lens design
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Author:
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Pauné Fabré, Jaime; Queiros, A; Quevedo Junyent, Luisa Jesús; Neves, H; Lopes Ferreira, D; Gonzalez Meijome, J.M.
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Òptica i Optometria; Universitat Politècnica de Catalunya. GRCUV - Grup de Recerca del Centre Universitari de la Visió |
Abstract:
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Purpose: To evaluate the performance of two experimental contact lenses (CL) designed to induce relative peripheral myopic defocus in myopic eyes.; Methods: Ten right eyes of 10 subjects were fitted with three different CL: a soft experimental lens (Exp-SCL), a rigid gas permeable experimental lens (ExpRGP) and a standard RGP lens made of the same material (StdRGP). Central and peripheral refraction was measured using a Grand Seiko open-field autorefractometer across the central 60 degrees of the horizontal visual field. Ocular aberrations were measured with a Hartman-Shack aberrometer, and monocular contrast sensitivity function (CSF) was measured with a VCTS6500 without and with the three contact lenses.; Results: Both experimental lenses were able to increase significantly the relative peripheral myopic defocus up to -0.50 D in the nasal field and -1.00 D in the temporal field (p < 0.05). The ExpRGP induced a significantly higher myopic defocus in the temporal field compared to the ExpSCL. ExpSCL induced significantly lower levels of Spherical-like HOA than ExpRGP for the 5 mm pupil size (p < 0.05). Both experimental lenses kept CSF within normal limits without any statistically significant change from baseline (p > 0.05).; Conclusions: RGP lens design seems to be more effective to induce a significant myopic change in the relative peripheral refractive error. Both lenses preserve a good visual performance. The worsened optical quality observed in ExpRGP was due to an increased coma-like and spherical-like HOA. However, no impact on the visual quality as measured by CSF was observed. (C) 2014 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved. |
Subject(s):
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-Àrees temàtiques de la UPC::Ciències de la visió::Contactologia -Àrees temàtiques de la UPC::Ciències de la salut::Medicina::Oftalmologia -Myopia -Contact lenses -Eye--Accommodation and refraction -Myopia -Custom-design -Contact lenses -Peripheral refraction -SLOW MYOPIA PROGRESSION -SPECTACLE LENSES -REFRACTION -ORTHOKERATOLOGY -CHILDREN -Miopia -Lents de contacte -Ulls -- Acomodació i refracció |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
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