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Moniritilaki M, Badakhsh M, Ehsaei A, Daneshvar R. The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma. JOVR [Internet]. 2020Oct.25 [cited 2024Apr.24];15(4):502–508. Available from: https://knepublishing.com/index.php/JOVR/article/view/7779

https://doi.org/10.18502/jovr.v15i4.7779

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authors

  • Mohammadreza Moniritilaki

    Mohammadreza Moniritilaki

    Department of Optometry and Vision Science, University of Melbourne, Victoria, Australia
  • Maryam Badakhsh

    Maryam Badakhsh

    Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
  • Asieh Ehsaei

    Asieh Ehsaei

    Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Optometry, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
  • Ramin Daneshvar

    Ramin Daneshvar

    Eye research Center, Mashhad University of Medical Science, Mashhad, Iran

Published Date

  • Oct 25, 2020
This journal is publishing all the articles under Creative Commons Attribution License CC BY 4.0.

The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma

Journal of Ophthalmic and Vision Research (JOVR) / October–December 2020, Volume 15, Issue 4 / Pages 502–508

Abstract

Purpose: Glaucoma causes irreversible visual field defects. This study aims to evaluate the effect of a reversed Galilean telescope on the visual field of patients with open-angle glaucoma.


Methods: Fifty-two glaucoma patients with a restricted visual field were recruited for this study. Central 30° visual field measurements were performed using a Humphrey visual field analyzer before and after applying the reversed Galilean telescope. To be more cosmetically acceptable, a combination of contact lens–spectacle was used as the reversed Galilean telescope.


Results: Our data analysis showed that the reversed Galilean telescope had a significant effect on all measured perimetric indices. Visual field index (VFI) improved from a basic value of 44.38 ± 26.96 percent to 49.30 ± 29.83 percent by using the reversed telescope (P < 0.001). Moreover, the mean deviation (MD) was significantly improved from the initial value of –19.91 ± 7.19 dB to a value of –18.69 ± 7.73 dB (P < 0.001). However, our results showed a significant reduction in the pattern standard deviation (PSD) comparing before (9.83 ± 2.82) and after (8.51 ± 3.30) values using the reversed Galilean telescope (P < 0.001).


Conclusion: The contact lens–spectacle combination reversed Galilean telescope significantly improved the central 30° visual field of glaucoma patients with the restricted visual field.

Keywords:

Glaucoma, Reversed Galilean Telescope, Visual Field

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