세막대 검사에서 막대 간 거리와 막대두께 차이에의한 동적입체시력의 변화 = Changes of Dynamic Stereoacuity Depending on Distance between Rods and Rod Thickness in Three Rods Test

다국어 초록 (Multilingual Abstract)

Purpose: To determine whether the distance between objects and the size of object are factors to be able to affect dynamic stereoacuity. Methods: Subjects were 37 adults (26 males and 11 females) with an average age of 23.89±1.76.
Refractive error was fully corrected for all subjects and each visual acuity of them was over 0.9. Three rods test was performed for measurement of stereoacuity. The viewing angles from left rod to right rod were set 5°, 10°, and 15° and the rod thickness used 7 mm, 14 mm, and 21 mm, respectively. Stereoacuity was repeatedly measured three times in each test condition at 2.5 m distance, and reported the average value of them. Results: When rod thickness was 7 mm or 14 mm, dynamic stereoacuity decreased as the viewing angle increased, and they were significantly decreased (p<0.01) at viewing angles of 10° and 15° as compared with that of at 5°, respectively. When rod thickness was 21 mm, dynamic stereoacuity decreased as the viewing angle increased, especially, that of at 15°decreased significantly (p<0.01) as compared with that of at 5°. The dynamic stereoacuity depending on the rod thickness have an increasing tendency as the rod thickness increased. Conclusions: The viewing angle between objects and the size of viewing object were factors that affect to dynamic stereoacuity.

국문 초록 (Abstract)

목적: 주시물체간의 거리와 물체의 크기 변화가 동적입체시력에 변화를 주는 요인인지 확인하고자 하였다. 방법: 피검사자는 평균연령 23.89 ±1.76세의 37명(남26명, 여11명)이었다. 모든 피검사자는 완전교정된 안경을 착용하였으며, 교정시력은 0.9 이상이었다. 입체시력은 세막대검사를 실시하였고, 좌·우 막대간 시야각은 5°, 10°, 그리고 15°, 막대두께는 7 mm, 14 mm, 그리고 21 mm로 하여 각각의 조건을 설정하였다. 각 조건에서의 입체시력 측정은 2.5 m 거리에서 각각 3회 반복측정하여 평균값을 기록하였다. 결과: 막대두께가 7 mm, 14 mm일 때, 시야각이 커질수록동적입체시력이 감소하였으며, 시야각 5°와 비교하여 10°와 15°에서 각각 유의하게 감소하였다(p<0.01). 막대두께가21 mm일 때, 시야각이 커질수록 동적입체시력이 감소하였으며, 특히 시야각 5°와 비교하여 15°에서 유의하게 감소하였다(p<0.01). 막대두께에 따른 동적입체시력은 막대가 두꺼워질수록 입체시력이 증가하는 경향이었다. 결론: 주시물체간의 시야각과 주시물체의 크기는 동적입체시력에 영향을 주는 요인인 것으로 나타났다.

참고문헌 (Reference)

1 심현석, "이간계와 삼간계를 이용한 동적 입체시의 비교" 한국안광학회 20 (20): 377-384, 2015

2 이민아, "운동선수와 대학생 남녀의 동체 시력 및 동적 입체시에 관한 비교 연구" 한국안광학회 14 (14): 43-49, 2009

3 김영청, "동적시력(KVA)과 동적 입체시의 비교 평가" 한국안광학회 19 (19): 519-525, 2014

4 심문식, "대학생의 동적시력에 관한 연구" 한국안광학회 17 (17): 419-424, 2012

5 심현석, "굴절이상 교정상태에 따른 동적시력 변화" 한국안광학회 18 (18): 165-171, 2013

6 Rawlings SC, "Stereoscopic acuity and horizontal angular distance from fixation" 59 (59): 991-993, 1969

7 Wong BPH, "Stereoacuity at distance and near" 79 (79): 771-778, 2002

8 Grosvenor T, "Primary Care Optometry" Butterworth-Heinemann 79-, 2007

9 Han KD, "Effects of the difference in visual angle and contrast for three rod stereoacuity ability" Kangwon National University 2016

10 Lovasik JV, "Effects of aniseikonia, anisometropia, accommodation, retinal illumination, and pupillary size on stereopsis" 26 (26): 741-750, 1985

11 Lim KH, "Dynamic stereoacuity in normal individuals" 41 (41): 2408-2414, 2000

12 Hirsch MJ, "Distance discrimination: I. Theoretic considerations" 39 (39): 210-223, 1948

13 Benjamin WJ, "Borish’s clinical refraction" Butterworth-Heinemann 921-957, 2006

14 Benjamin WJ, "Borish’s clinical refraction" Butterworth-Heinemann 147-149, 2006