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I.緒言
著者は前二報において,赤外線暗視装置を応用して,暗順応時の最大散瞳時瞳孔径,並びに,縮瞳薬点眼時の縮瞳経過について実験及び考察を行つたのであるが,今回は,暗順応時,特にその初期の瞳孔の散大経過について実験を行つた。
従来,暗順応時の散瞳経過については多数の研究が行われており,特に暗順応開始後長時間に亘る瞳孔の散大経過については,比較的多くの業績を見出すのであるが,暗順応開始初期の瞳孔運動の最も大きな時期におけるものに関する研究は非常に少い。
The initial processes occurred in pupillary dilatation during the change from light (3000 rlx and 300rlx) to dark adaptation were investigated by means of iufrared noctovision
(1) Incubation time before the onset of mydriasis was 0.4003 secs. under the light of 3000 rlx. and 0.3980 secs. under 300rlx., which were not different each other significantly.
(2) The initial diameter of the pupil was smaller under 3000rlx., than under 300rlx., while the speed of pupillary dilatation toward its maximum was higher in the former.
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