Corneal Asphericity Variations in Korean Myopic Children

• 발행기관: 대한검안학회
• 저자명: Hyo Sin Kim Sun-Kyung Park Woong-Joo Whang Ho Sik Hwangm Kyung-Sun Na
• 간행물 정보: 『Annals of optometry and contact lens』Vol.21 No.1, 15~20쪽, 전체 6쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 2022.03.30

영문 초록

Purpose: Corneal asphericity (Q-value) represents the difference in curvature from center to periphery of the cornea. This study evaluated horizontal and vertical asymmetry in corneal asphericity in myopic children and its relationship with various ocular parameters. Methods: This retrospective study included 47 eyes in 24 myopic Korean children. Corneal parameters, such as corneal asphericity and thickness, apical radius of curvature, and high order aberrations including total root mean square (RMS), spherical aberration, coma, and trefoil were analyzed by Pentacam. Axial lengths (ALs) and anterior chamber depths (ACDs) were measured by IOL master. From these values, characteristics of corneal asphericity differences between nasal-temporal and superior- inferior quadrants in myopic children and their relationship with other ocular parameters were evaluated. Results: The mean Q-value (8 mm) was -0.34 ± 0.10, representing a prolate corneal shape. The mean superior-inferior Q-value differences (8 mm) was 0.23 ± 0.17, which was greater than the mean nasal-temporal Q-value differences (8 mm) measured as 0.15 ± 0.13. The mean Q-value (8 mm) was not significantly related to AL or ACD, and Q-values in each quadrant (8 mm) also showed no significant relationship with corneal thickness in each corresponding quadrant. The nasal-temporal Q-value differences (8 mm) had a positive relationship with total RMS (p = 0.001) and a negative relationship with oblique trefoil (p = 0.045) and spherical aberration (p = 0.007). The superior-inferior Q-value differences (8 mm) showed a negative relationship with vertical trefoil (p = 0.003). Conclusions: The results of the study showed a variation of nasal-temporal and superior-inferior Q-value differences, and the relationship between corneal shape and other ocular dimensions in myopic Korean children. Further study with large data set is merited to ascertain the epidemiologic data of Asian ethnicity.

목차

INTRODUCTION

MATERIALS AND METHODS

RESULTS

DISCUSSION

REFERENCES

키워드

Corneal topography Corneal wave front aberration Myopia