Analysis of eye movement using an infrared television funduscopy

研制了一种新的红外电视眼底观察仪。作为视觉刺激，该仪器具有计算机图形系统和硬件靶系统，采用脉冲刺激和斜坡刺激，研究了人视网膜中央凹和视旁区的敏感性和空间总和的临界面积，由完全空间总和和非总和的临界面积计算出感受野，感受野直径与视网膜偏心率呈线性函数关系。使用脉冲刺激，计算出最小二乘线为Y=0.55E+4.15，其中Y是感受野的直径，E是视网膜偏心率。这与猴子的Y系统相对应。用斜波刺激，得到Y=0.21E+2.19，相当于猴的X系统，刺激视网膜相应点，检查双眼阈值。对侧眼给予阈值附近的刺激时，存在易化效应，优势眼的眼跳潜伏期短于非优势眼。

A new instrument for observing the fundi of the both eyes by infrared television was made. As visual stimuli, the instrument has both computer graphics system and the hardware target system.Retinal sensitivity and the critical area of the spatial summation in the foveal and parafoveal regions were investigated using pulse stimuli and ramp stimuli in man. The receptive fields were calculated from the critical area of complete spatial summation and non-summation.The diameter of the receptive field is a linear function of retinal eccentricity. Using pulse stimuli the least-sqare line was calculated to be Y=0.55E+4.15, where Y is the diameter of the receptive field and E is the retinal eccentricity. This corresponds to the Y system in the monkey. Using ramp stimuli, Y=0.21E+2.19 was obtained, which corresponds to the X system in the monkey.Threshold was examined in both eyes stimulating the corresponding points of the retina. Facilitation effect was observed when the stimuli near the threshold were given to the other eye.Saccadic latency was shorter when the stimuli were given to the dominant eye than non-dominant eye.