Harris L R, Cynader M
Exp Brain Res. 1981;44(1):41-56. doi: 10.1007/BF00238748.
Cats reared in total darkness to adulthood have abnormal eye movements. A spontaneous nystagmus is found in the dark before any visual experience. The eye movements evoked by vestibular or optokinetic stimulation are less effective at compensation than for a normal cat. The vestibulo-ocular reflex (VOR) has a low gain (around 0.3) and a frequency dependent phase relation. The efficiency of optokinetic nystagmus (OKN) is poorer than for a normal cat, except for downwards stimulus movement which is followed better than normal. OKN is poorest in response to a stimulus viewed monocularly moving in the nasal to temporal direction. Neither VOR nor OKN of a dark-reared cat recover in efficiency within 5 months of the animal being brought into the light. A normal cat put into the dark for 135 days shows none of these abnormalities except an occasional spontaneous nystagmus.
在完全黑暗环境中饲养至成年的猫会出现异常的眼球运动。在有任何视觉体验之前，在黑暗中就会发现自发性眼球震颤。与正常猫相比，前庭或视动刺激诱发的眼球运动在代偿方面效果较差。前庭眼反射（VOR）增益较低（约为0.3）且存在频率依赖性相位关系。视动性眼球震颤（OKN）的效率比正常猫差，除了向下的刺激运动比正常情况更易被追踪。单眼观察到的从鼻侧到颞侧方向移动的刺激引发的OKN反应最差。在将黑暗饲养的猫置于明亮环境中5个月内，其VOR和OKN的效率均未恢复。一只正常的猫被置于黑暗环境135天，除偶尔出现自发性眼球震颤外，未表现出这些异常。
