頭頸部損傷における調節の準静的特性

Quasistatic characteristics of accommodation following head-neck injury

　頭頸部損傷患者の後遺症としての調節障害は，従来の自覚的な調節機能検査では有意な異常所見を見出せず，その程度を容易に把握することが困難であったが，調節の準静的特性，すなわち連続的にAr／As （調節反応量）を記録する方法を用いて検査することで，本障害の程度が容易に捉えられ，次の4型に他覚的に分類できた．

1）正常反応型：調節機能が正常者と同様の視標速度まで反応を示すもの．

2）軽度反応低下型：視標速度が0.2D／secでは正常反応だが，それ以上の速度で調節反応の低下を示すもの．

3）中等度反応低下型：視標速度が0.2D／secで調節反応が低下するもの．

4）高度反応低下型：視標速度が0.2D／secで調節反応が記録されないもの．

We evaluated a series of 22 patients after head-neck blung injury with particular regard to the state of accommodation. The ages of the patients ranged from 20 to 35 years. We performed direct on-line recordings of accommodative stimulus (AS) versus accommodative response (AR).

The cases were divided into four groups accord-ing to the abnormalities in accommodative func-tion. (1) Normal response group. Accommodative response was normal at all target velocities. (2) Slightly abnormal response group. The accom-modative response was normal at 0.2D (diopter) per second but was abnormal at higher velocities. Accom-modative response showed abnormal pattern at 0.2D/sec. (4) Highly abnormal response group. Accommodative response was non-recordable at the velocity of 0.2D/sec.

Rinsho Ganka (Jpn J Clin Ophthalmol) 41(7) : 785-789, 1987