前言 过往二十年,医疗技术突飞猛进。最普遍致盲的眼疾,如白内障、青光眼、甚至视网膜脱落,都有良好的医治方法。至于因视力障碍而生活受影响的低视能人士,只要获得适当助视器,就可以与健视人士一样接受教育和工作,贡献社会。防盲、治盲的技术,设备和仪器在先进国家和大城市,已相当普及。但这些发展,并未能惠及大部分之视障人 Foreword Over the past two decades, medical technology has advanced by leaps and bounds. The most common blindness eye diseases, such as cataracts, glaucoma, and even retinal detachment, have good healing methods. As for people with low vision who have been affected by visual impairment, they can receive education and work as well as the visually minded person as long as they receive appropriate visual aids. The technology, equipment and instruments for preventing blindness and curing blindness have become quite popular in advanced countries and big cities. However, these developments have not benefited most of the visually impaired people.