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자료유형
학술저널
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저널정보
대한안과학회 Korean Journal of Ophthalmology Korean Journal of Ophthalmology 제33권 제2호
발행연도
2019.1
수록면
173 - 180 (8page)

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Purpose: To document the development of disc torsion. Methods: Consecutive disc photographs obtained at an interval of at least 1 year were reviewed retrospectivelyin 173 eyes of 173 Korean children. The angle of the vertical disc axis (AVDA) was measured in each fundusphotograph with the fovea-disc center axis set at 0°. The associated change in the morphology of the opticdisc was assessed by measuring the ratio of the horizontal to vertical disc diameters and the ratio of the maximumparapapillary atrophy width to vertical disc diameter. Eyes were divided into two groups with respect tothe development of disc torsion: torsion and non-torsion group. Progressive torsion was defined as a changein AVDA between baseline and follow-up photographs beyond the coefficient of intraobserver repeatab ility. Factors associated with optic disc torsion were evaluated using logistic regression analysis. Results: Mean subject age and refractive error at the time of baseline fundus examination were 6.8 ± 1.7 (range,2 to 11) years and 0.2 ± 2.6 (range, -6.0 to +5.5) diopters, respectively. Mean follow-up period was 44.8 ± 21.1(range, 12 to 103) months. Forty-two eyes (24%) were classified as torsion group who showed changes inAVDA that were greater than the intraobserver measurement variability (4.5°) during the follow-up period. Thedevelopment of optic disc torsion was associated with greater myopic shift, a decrease in horizontal to verticaldisc diameters, and an increase in parapapillary atrophy width to vertical disc diameter. Conclusions: Progressive optic disc torsion was a common phenomenon in the children included in this study. Torsion occurred as the result of optic disc tilt in an oblique axis in most cases. The findings provide a frameworkfor understanding torsion-related glaucomatous optic nerve damage.

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