|
KMID : 1011420200250030315
|
|
Journal of Korean Ophthalmic Optics Society
2020 Volume.25 No. 3 p.315 ~ p.321
|
|
|
Influence of Uncorrected Myopic and Astigmatic Refractive Error on the Ocular Counter-roll
|
|
Oh Kwang-Keun
Cho Hyun-Gug
Moon Byeong-Yeon
Kim Sang-Yeob
Yu Dong-Sik
|
|
|
Abstract
|
|
|
Purpose: This study aimed to evaluate the influences of uncorrected myopic and astigmatic refractive error on the ocular counter-roll (OCR).
Methods: Forty-five college students (mean age 21.98±1.96 years) participated in this study. All subjects underwent a measurement of the OCR at head tilts of 10o, 20o, 30o in the right and left directions using a slit lamp microscope with an ophthalmic camera during fixation at a target of 40 cm distance in an uncorrected refractive error.
Results: When the uncorrected myopia group less than ?3.00 D and over ?3.00 D were compared, a significant difference was found in the mean OCR in the condition of head tilt 10 ° (to the right: p=0.011, left: p=0.033). The mean differences of OCR between the astigmatism group less than ?1.00 D and over ?1.00 D were significant in conditions of 10° to the right and 20o to the left directions (to the right 10°: p=0.028, left: p=0.004). Although not statistically significant, the mean OCR increased as the amount of uncorrected refractive error increased in all groups. In the correlation analysis, both the myopia and astigmatism groups showed a positive correlation on the right and left at head tilt 10o (to the right: r=0.379, 0.460, left: r=0.341, 0.394, respectively), and the left head tilt 20° in the astigmatism group (r=0.465) also showed a positive correlation (r=0.465).
Conclusions: The amount of uncorrected myopic and astigmatic refractive errors had an influence on the mean OCR. Therefore, the full correction of refractive error may be warranted to prevent the occurrence of unnecessary OCR.
|
|
|
KEYWORD
|
|
|
Ocular torsion, Ocular counter-roll, Iris image, Slit lamp microscope, Refractive error
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|