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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Dziura, James Li, Fang-Yong Salchow, Daniel J. Hwang, Anita M. |
| Description | Country affiliation: United States Author Affiliation: Salchow DJ ( Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, Connecticut 06510, USA. daniel.salchow@yale.edu) |
| Abstract | PURPOSE: To study the effect of contact lens (CL) power on retinal nerve fiber layer (RNFL) thickness measurements using optical coherence tomography (OCT). METHODS: Cross-sectional study on 15 healthy subjects. Peripapillary RNFL thickness was measured using time-domain OCT without CL and with CL of different powers (+4 D, +10, -4D, and -10 D), and again without CL. RNFL thickness measurements were compared statistically. RESULTS: Age of study subjects was 30.5 ± 3.2 (mean ± SD) years. Global RNFL thickness measurements showed good repeatability (average without CL was 107 ± 9.3 µm for the first measurement, and 107.4 ± 7.4 µm for the second [P = 0.8]). There was no significant effect of CL power on global RNFL thickness, although more variability was observed with the -10 D CL. When analyzing individual clock-hour segments, only differences in the 6 o'clock hour segment were statistically significant (between -10 D CL [155.9 ± 22.4 µm] and without CL [143.5 ± 19.3 µm], as well as between -10 D and +4 D CL [138.9 ± 19.9 µm], with P < 0.001). When analyzed for individual quadrants, differences in the inferior quadrant were significant between measurements with -10 D CL and all other CLs. CONCLUSIONS: Refractive error changes at the corneal plane do not significantly affect RNFL thickness measurements using OCT; caution is warranted in inferior segments, where variations may occur. These results may be applicable to RNFL thickness measurements before and after cataract or refractive surgery. |
| ISSN | 01460404 |
| e-ISSN | 15525783 |
| Journal | Investigative Opthalmology & Visual Science |
| Issue Number | 3 |
| Volume Number | 52 |
| Language | English |
| Publisher | Association for Research in Vision and Ophthalmology |
| Publisher Date | 2011-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Contact Lenses Nerve Fibers Pathology Refractive Errors Physiopathology Retinal Ganglion Cells Tomography, Optical Coherence Cross-sectional Studies Therapy Research Support, Non-u.s. Gov't Discipline Ophthalmology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ophthalmology Sensory Systems Cellular and Molecular Neuroscience |
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