Estimation of the hybrid lens parameters through rigid gas permeable lens fitting

Hasani, M. and Hashemi, H. and Jafarzadehpur, E. and Yekta, A. A. and Dadbin, N. and Khabazkhoob, M. (2016) Estimation of the hybrid lens parameters through rigid gas permeable lens fitting. Journal of Current Ophthalmology, 28 (3). pp. 137-141.

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Abstract

Purpose To estimate the fitting parameters of the hybrid contact lens in patients with corneal ectasia using the rigid gas permeable (RGP) lens. Methods Thirty-four eyes with corneal ectasia were evaluated in this study. The patients were examined once with the RGP lens and once with the hybrid contact lens. The relationship between the base curvature of the RGP and the vault of the hybrid lens and the correlation between their powers were analyzed. Results We found a linear relationship between the base curvature of the RGP lens and the vault of the hybrid lens (P < 0.001) (R2 = 0.45). Moreover, we found a correlation between the power of the RGP and hybrid lens (P < 0.001) (R2 = 0.4). However, a 0.5 mm decrease in the base curvature radius of the RGP lens increased the vault of the hybrid lens by 72 μ. Conclusion The results of this study could be used for better and faster selection of the first hybrid contact lens. © 2016 Iranian Society of Ophthalmology

Item Type: Article
Additional Information: Cited By :1 Export Date: 16 February 2020 Correspondence Address: Jafarzadehpur, E.; Department of Optometry, Iran University of Medical SciencesIran; email: jafarzadehpour.e@iums.ac.ir
Uncontrolled Keywords: Corneal ectasia Hybrid lens Keratoconus Rigid gas permeable lens fluorescein adult Article clinical article controlled study cross-sectional study dispersion female gas permeable contact lens hard contact lens human male middle aged retinoscopy slit lamp
Subjects: WW Ophthalmology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib4 lib4
Date Deposited: 02 Mar 2020 06:15
Last Modified: 02 Mar 2020 06:15
URI: http://eprints.mums.ac.ir/id/eprint/13020

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