The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma
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. Centr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Knowledge E
2020-10-01
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| Series: | Journal of Ophthalmic & Vision Research |
| Subjects: | |
| Online Access: | https://doi.org/10.18502/jovr.v15i4.7779 |
| _version_ | 1811333189343379456 |
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| author | Mohammadreza Moniritilaki Maryam Badakhsh Asieh Ehsaei Ramin Daneshvar |
| author_facet | Mohammadreza Moniritilaki Maryam Badakhsh Asieh Ehsaei Ramin Daneshvar |
| author_sort | Mohammadreza Moniritilaki |
| collection | DOAJ |
| description | 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 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. |
| first_indexed | 2024-04-13T16:48:23Z |
| format | Article |
| id | doaj.art-62cca710ec59445f8a8cd405e489d46f |
| institution | Directory Open Access Journal |
| issn | 2008-322X |
| language | English |
| last_indexed | 2024-04-13T16:48:23Z |
| publishDate | 2020-10-01 |
| publisher | Knowledge E |
| record_format | Article |
| series | Journal of Ophthalmic & Vision Research |
| spelling | doaj.art-62cca710ec59445f8a8cd405e489d46f2022-12-22T02:39:00ZengKnowledge EJournal of Ophthalmic & Vision Research2008-322X2020-10-011550250810.18502/jovr.v15i4.7779The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle GlaucomaMohammadreza Moniritilaki0Maryam Badakhsh1Asieh Ehsaei2Ramin Daneshvar3 Eye Research Center, Mashhad University of Medical Science, Mashhad, Iran Eye Research Center, Mashhad University of Medical Science, Mashhad, Iran Eye Research Center, Mashhad University of Medical Science, Mashhad, Iran Eye Research Center, Mashhad University of Medical Science, Mashhad, IranPurpose: 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 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.https://doi.org/10.18502/jovr.v15i4.7779glaucomareversed galilean telescopevisual field |
| spellingShingle | Mohammadreza Moniritilaki Maryam Badakhsh Asieh Ehsaei Ramin Daneshvar The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma Journal of Ophthalmic & Vision Research glaucoma reversed galilean telescope visual field |
| title | The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma |
| title_full | The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma |
| title_fullStr | The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma |
| title_full_unstemmed | The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma |
| title_short | The Effect of Contact Lens–spectacle Reversed Galilean Telescope on the Visual Field of Patients with Open-angle Glaucoma |
| title_sort | effect of contact lens spectacle reversed galilean telescope on the visual field of patients with open angle glaucoma |
| topic | glaucoma reversed galilean telescope visual field |
| url | https://doi.org/10.18502/jovr.v15i4.7779 |
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