The Dynamics of Peripheral Refraction and Eye Shape in Children with Progressive Myopia Wearing Orthokeratology Lenses
| Autor: | E. P. Tarutta, E. N. Iomdina, R. R. Toloraya, G. V. Kruzhkova |
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| Jazyk: | ruština |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Российский офтальмологический журнал, Vol 9, Iss 1, Pp 62-66 (2018) |
| Druh dokumentu: | article |
| ISSN: | 2072-0076 2587-5760 |
| DOI: | 10.21516/2072-0076-2016-9-1-62-66 |
| Popis: | The change of peripheral refraction and the shape of 52 myopic eyes of 26 patients aged 8 to 16 (averagely, 10.4 ± 0,9 years) resulting from overnight wearing of orthokeratology lenses was followed up for 3.2 ± 0.9 years on average. The use of Ortho-k lenses was found to form relative peripheral myopia, whose value correlated with the initial degree of myopia and was averagely equal to -1.4 ± 0.13 D, -1.9 ± 0.17 D and -4.4 ± 0.13 D, respectively for low, moderate and high myopia. The ratio coefficient APA/HD between the length of the anterioposterior axis (APA) and the horizontal diameter (HD) of the eye changed from the initial value, which was averagely equal to 1.01 ± 0.06 (1.00 ± 0.002 for low myopia, 1.01 ± 0.008 for moderate myopia, and 1.02 ± 0.003 for high myopia), to -0.98 ± 0.006 (-0.94 ± 0.001 for low myopia, 0.98 ± 0.007 for moderate myopia, and - 1.00 ± 0.006 for high myopia) by the end of lens wearing term. This dynamics of APA/HD variation is an evidence of eyeball shape change as a result of prolonged use of ortho-k lenses toward the shape of a oblate ellipsoid. This is accompanied by the formation of a peripheral myopic defocus // Russian Ophthalmological Journal, 2016; 1: 62-6. |
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