목적: 38세 이상 50세 미만의 초기노안자 52명을 대상으로 1차시기(08:00~10:00), 2차시기(13:00~15:00), 3차시기(18:00~20:00)에 걸쳐 조절기능의 일일변화를 조사하였다. 방법: 초기노안자 52명(남 30명, 여 22명)을 근거리 작업량에 따라 4군(I군: ${geq}$ 7 hrs~IV군: < 3 hrs)으로 분류하여 조절력, 조절용이성, 상대조절력을 검사하였다. 결과: 조절력은 하루 일과 중 근업이 가장 많은 I군에서 가장 낮은 것으로 측정되었고, 단안과 양안의 조절력은 I군~IV군 모두 2차시기의 조절력이 가장 높았다. 조절용이성에서 I군의 단안과 양안, II군의 단안 그리고 III군의 단안과 양안은 2차시기가 가장 높았고, II군의 양안과 IV군의 단안과 양안은 3차시기가 가장 높은 것으로 나타났다. 허성상대조절력은 I군~IV군 모두 1차시기가 가장 높았고, 실성상대조절력의 경우 I~III군은 2차시기가, IV군은 3차시기가 가장 높은 것으로 나타났다. 결론: 작업환경 및 시간은 조절기능에 영향을 줄 수 있으므로 초기노안자의 경우 하루 일과 중 업무 시간대를 고려하여 조절기능에 대한 검사를 하는 것이 안정피로 증상을 해소하는데 도움이 될 것이다.
Purpose: The daily changes of accommodation at period 1 (08:00~10:00), period 2 (13:00~15:00) and period 3 (18:00~20:00) were surveyed with fifty two incipient presbyopia of from 38 to 49 years old. Methods: 52 incipient presbyopia subjects (30 men, 22 women) were classified into 4 groups (groupI: ${geq}$ 7 hrs~group IV: < 3 hrs) according to near working amount. Their amplitude of accommodation, accommodative facility and relative amplitude of accommodation were inspected, respectively. Results: The amplitude of accommodation was measured to be the lowest for the groupI that near working time was the most during daily work, and the amplitude of accommodation of oculus dexter, oculus sinister and oculus uterque were the highest at period 2 in case of all the group I~IV. In the accommodative facility, it appeared that the oculus dexter, oculus sinister and oculus uterque of group I, oculus dexter and oculus sinister of group II, and oculus dexter, oculus sinister and oculus uterque of group III were the highest at period 2. The oculus uterque of group II and oculus dexter, oculus sinister and oculus uterque of group IV were the highest accommodative facility at period 3. It appeared that the negative relative accommodation was the highest at period 1 in case of all the group I~IV, and the positive relative accommodation was the highest at period 2 in case of the group I~III and was the highest at period 3 in case of the group IV. Conclusions: Because the difference of near working time affects the accommodation, it would become a help in solving the asthenopia symptom of the incipient presbyopia that opticians consider their near working time during daily work and take a checkup on their accommodation.
