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KMID : 1011420120170040469
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Journal of Korean Ophthalmic Optics Society
2012 Volume.17 No. 4 p.469 ~ p.476
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Comparison of Corneal Asphericity with Measuring Range
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Jeon In-Chul
Jeong Woo-Jae
Kang Ji-Hun
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Abstract
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Purpose: The purpose of this study is to investigate the changes of asphericity according to diameter and direction of the cornea. Methods: The changes of asphericity according to diameter and direction of cornea is measured by using Pentacam(Oculus Co., Germany), as targeting 57 adults (average 27.0±4.8, 20 men, 37 women) without any ophthalmic diseases, which may be effective in eyesight, and refractive surgery. Results: As diameter increases in every direction based on the corneal vertex, asphericity has attentively increased (p<0.05), and the size of asphericity in each direction from every measured diameter showed as superior > nasal > inferior > temporal. In group comparison by nearsightness and astigmatism level, asphericity measured high when nearsightness and astigmatism levels were higher, and this appears to be statistically attentive.(p<0.05). Conclusions: Asphericity of cornea significantly increased according to increase of diameter of cornea, and as measured figure or increased quantity appeared differently in all directions based on corneal vertex, so it helps to understand shape of cornea, and considered that is the part to be considered during manufacturing and fitting of RGP lenses.
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KEYWORD
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Cornea, Corneal type, Asphericity, Myopia, Corneal astigmatism, Pentacam
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