Relief-topography of anterior and posterior corneal surfaces in myopic patients in the long-term follow-up period after anterior radial keratotomy
Purpose. To analyze the topographical features of the relief of anterior and posterior corneal surfaces in patients with myopia in the long-term period after anterior r adial keratotomy (ARK).Material and methods. We examined 132 patients with age-related cataracts of varying degrees of density and...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Russian |
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Publishing house "Ophthalmology"
2021-04-01
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| Series: | Офтальмохирургия |
| Subjects: | |
| Online Access: | https://www.ophthalmosurgery.ru/jour/article/view/723 |
| Summary: | Purpose. To analyze the topographical features of the relief of anterior and posterior corneal surfaces in patients with myopia in the long-term period after anterior r adial keratotomy (ARK).Material and methods. We examined 132 patients with age-related cataracts of varying degrees of density and a history of myopia with previously performed ARK. Mean age of patients was 59.67±6.09 (from 47 to 76). In the control group, 30 patients of the same age group with myopia were examined. A comprehensive examination was performed, including optical biometry, keratotopography on the Pentacam HR device with the determination of the elevation points of the anterior and posterior corneal surfaces.Results. The corneal profile differed from the correct spherical configuration in the control group. The average deviation of the profile of the anterior part of the cornea from the BFS was (–)1.41±5.10 μm, the posterior part was (–)5.12±12.25 μm (p=0.0001). The profile of the posterior corneal surface had a pronounced prolapse in the paracentral area with positive elevation values in the lower-outer segment. Negative values were found in the upper and lower sectors in the peripheral area and positive values were found in the inner and outer sectors. The corneal profile was deformed in patients after ARK. Negative elevation values in the central and paracentral area and positive elevation values in the peripheral segments corresponding to its protrusion were noted. At the same time, the relief of anterior and posterior surfaces of the cornea was not regular. Prolapse from the posterior surface of the cornea in the peripheral area was more pronounced than its anterior surface (p=0.0001).Conclusion. The relief of anterior and posterior corneal surfaces in patients of the control group differs in the degree and topography of elevation. In patients after ARK, obvious topographic deformities of the anterior and posterior corneal pr ofiles were detected. |
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| ISSN: | 0235-4160 2312-4970 |