When you see your ophthalmologist, he or she may tell you that there is no hope of treating your eye disease. Please do not be overly disappointed, come to the low vision clinic, there may be one last chance to improve your vision and get rehabilitation. Visual rehabilitation is: taking various measures to utilize the patient’s residual vision and mitigate the effects of visual disability. The primary measure of rehabilitation currently relies on a variety of visual aids. A visual aid is similar to a hearing aid in that a hearing aid enables a person with poor hearing to hear sounds that he could not hear, while a visual aid enables a person with low vision to see clearly what he could not see or could not see. Therefore, any device or equipment that can improve the vision of a person with a visual disability is called a vision aid.