为已经完全丧失视觉的盲人再造视觉,在本世纪中叶已经有人进行探索。专家们注意到:绝大多数盲人,虽然不能接受外界景物的光刺激,但产生视觉的大脑视皮层仍是健康的。因此,他们便萌发了直接刺激大脑视觉中枢,让盲人(皮质盲人除外)产生视觉的设想。 40多年前,德国神经外科专家福斯特在病人局麻下施行枕骨板手术时,有意识地刺激了视皮层,结果病人感到有光点出现。当重复刺激同一区域的视皮层时,病人感到在他的视野中心有固定光点存在。后来,神经生理学家彼蒂尔德等的观 To recreate the vision of blind people who have completely lost their sight, somebody has explored it by the middle of this century. Experts note that most blind people, although not able to accept the light stimuli from the outside world, are still healthy in the visual cortex. As a result, they have developed the vision of directly stimulating the visual center of the brain and making the blind, except for the cortical blind. More than 40 years ago, German neurosurgical specialist Foster consciously stimulated the visual cortex when he was operated on under the patient’s local anesthetic. As a result, the patient felt a light spot. When repeatedly stimulating the visual cortex in the same area, the patient feels that there is a fixed spot of light in the center of his field of vision. Later, the view of neurophysiologist Peter Tilde et al