목적: 경북지역 성인들의 사위와 안정피로의 연관성을 조사하였다. 방법: 사시안, 안질환 또는 전신질환이 없는 18세에서 35세까지의 근시안을 가진 80명을 대상으로, 교정시력, 교정굴절력, 사위검사, 융합여력검사를 실시하여 사위와 융합여력에 따른 안정피로 발생 유무를 조사하였다. 결과: 80명 가운데 52명이 안정피로를 호소하였고 이 가운데 외사위는 58.5%, 내사위는 41.5%였다. 18.5%는 근거리에서 정상으로 간주되는 0-6△의 외사위를 가지고 있었고, 81.5%는 정상범위를 벗어난 사위를 가지고 있었다. 융합여력의 크기는 사위량이 많을수록 적어졌으며, 융합여력이 사위량의 2배 이상인 사람이 28.5%이고 2배 미만인 사람이 71.5%로 조사되었다. 안정피로를 호소하는 사람 가운데 32.9%는 융합여력이 2배 이상인 사람이고, 67.1%는 융합여력이 2배 미만인 사람이었다. 결론: 사위안의 융합여력이 안정피로와 연관성이 있음을 알 수 있었고 사위안의 처방시 융합여력을 검사해야할 것으로 생각된다.

Purpose: The aim of this study was to evaluate the relationship between phoria and asthenopia in adults in Kyoung-Buk area. Methods: We examined the corrected visual acuity, corrected refractive error, phoria and fusional reserve of 80 healthy myopes aged from 18 to 35 years old who had no strabismus, no ocular and physical diseases. And we evaluated the occurrence of asthenopia according to phoria and fusional reserve. Results: 52 out of 80 subjects which exophoria was 58.5% and esophoria was 41.5% made a complaint against asthenopia. The subjects who had exophoria of 0-6△ in the range of normal state was 18.5%, while the subjects who had exophoria of 7△ or more in the range of abnormal state was 81.5%. Reducing fusional reserve was associated with increasing phoria. The subjects who had the fusional reserve twice or more than phoria were 28.5%, and twice or under were 71.5%. The asthenopia complaint persons who had the fusional reserve twice or more than phoria were 32.9%. And the asthenopia no complaint persons who had fusional reserve twice or under comparing to phoria were 67.1%. Conclusion: We found a relationship between asthenopia and fusional reserve of phoria and considered that fusional reserve must be examined when we prescribe for a patient with phoria.

• 윤경한(대경대학교 안경광학과)