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자료유형
학술저널
저자정보
박홍현 (중앙대학교 의과대학 중앙대학교병원 안과학교실) 박인기 (경희대학교) 신재호 (강동경희대학교병원) 전연숙 (중앙대학교)
저널정보
대한의학회 Journal of Korean Medical Science Journal of Korean Medical Science Vol.34 No.4
발행연도
2019.1
수록면
1 - 10 (10page)

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Background: To objectively investigate accommodative response to various refractive stimul in subjects with normal accommodation. Methods: This prospective, non-randomized clinical trial included 64 eyes of 32 subjects with a mean spherical equivalent −1.4 diopters (D). We evaluated changes in accommodative power, pupil diameter, astigmatic value, and axis when visual stimuli were applied to binocular, monocular (dominant eye, non-dominant eye, ipsilateral, and contralateral), and pinhole conditions. Visual stimuli were given at 0.25 D (4 m), 2 D (50 cm), 3 D (33 cm), and 4 D (25 cm) and accommodative response was evaluated using open view binocular autorefractor/keratometer. Results: The accommodative response to binocular stimulus was 90.9% of the actual refractive stimulus, while that of the monocular stimulus was 84.6%. The binocular stimulus induced a smaller pupil diameter than did the monocular stimulus. There was no difference in accommodative response between the dominant eye and non-dominant eye o between ipsilateral and contralateral stimuli. As the refractive stimuli became stronger, th absolute astigmatic value increased and the direction of the astigmatism axis became mor horizontal. Pinhole glasses required 10%–15% less accommodative power compared with the monocular condition. Conclusion: Binocular stimuli enable more precise and effective accommodation than do monocular stimuli. Accommodative response is composed of 90% true accommodation and 10% pseudo-accommodation, and the refractive stimulus in one eye affects the contralateral eye to the same extent. This should be taken into account when developing guidelines for wearing smart glasses while driving, as visual stimulation is applied to only one eye, but far distance attention is constantly needed.

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