Haidinger�s brush, an entoptic phenomenon, is very useful in checking central vision loss and eccentric fixation. Haidinger�s brush\nis also used to provide vision training for subjects affected by eccentric fixation/lazy eye.We propose the use of Haidinger�s brush\nfor mass self-screening of vision in cinema the atres in one go and at no cost to the subjects. We also suggest a simple projection\ntechnology for mass vision screening of subjects in waiting rooms or at shop windows of eye-care practitioners. Finally, we propose\na new affordable handheld device for vision training. The test and the devices that we propose would increase public awareness of\neye health, improve vision in children, and help prevent blindness in the elderly.
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