| Autor: |
R K, Winkle, T H, Mader, V C, Parmley, L J, White, K A, Polse |
| Rok vydání: |
1998 |
| Předmět: |
|
| Zdroj: |
Ophthalmology. 105(2) |
| ISSN: |
0161-6420 |
| Popis: |
Refractive changes at high altitude that occur after radial keratotomy (RK) may be caused by hypoxia or hypobaria.A prospective study was performed to evaluate the effects of hypoxia on RK and non-RK corneas.There were 20 RK and 20 control eyes.These eyes were subjected to ocular surface hypoxia using an air-tight goggle system at sea level for 2 hours.Keratometry, cycloplegic refraction, and pachymetry were evaluated using repeated measures analysis of variance.A significant hyperopic shift (P0.0001) and corneal flattening (P0.0013) occurred in all subjects with RK compared with those of control subjects. Corneal thickening occurred symmetrically in both groups.These results suggest that refractive changes in subjects with RK occur at high altitude as a direct result of corneal hypoxia. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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