Mimura O, Inui T, Kani K, Ohmi E
Jpn J Ophthalmol. 1984;28(4):389-400.
The retinal sensitivity and the spatial summation function in the foveal and parafoveal regions of unilaterally amblyopic patients with eccentric fixation were studied psychophysically by means of a refined fundus perimeter; the device made possible continuous and simultaneous monitoring of the subject's fundus, fixation behavior and location of the stimulus on the retina, and enabled us to obtain selectively reliable data. In 9 out of 10 amblyopic eyes, the retinal sensitivity was the highest at the subject's eccentric fixation locus, demonstrating central relative scotoma. In the fovea of amblyopic eyes, the spatial summation curve showed an abnormal gradient when tested with small stimuli, suggesting an enlarged spatial summation area at the amblyopic fovea. On the other hand, the spatial summation curve at the eccentric fixation locus was comparable to that at the corresponding eccentric locus of the nonamblyopic fellow eye, suggesting the spatial summation function at the peripheral retina was normal in the amblyopic eye.
利用改良的眼底视野计，通过心理物理学方法研究了单侧偏心注视弱视患者黄斑中心凹及旁中心凹区域的视网膜敏感度和空间总和功能；该设备能够连续同时监测受试者的眼底、注视行为以及刺激在视网膜上的位置，使我们能够选择性地获取可靠数据。在10只弱视眼中，有9只眼在受试者偏心注视位点处视网膜敏感度最高，显示出中心相对暗点。在用小刺激进行测试时，弱视眼黄斑中心凹的空间总和曲线呈现异常梯度，提示弱视眼黄斑中心凹的空间总和区域扩大。另一方面，偏心注视位点处的空间总和曲线与健侧眼相应偏心位点处的曲线相当，提示弱视眼周边视网膜的空间总和功能正常。
