A study released by Singaporean researchers on September 24, 2011 states that nearly 60% of smokers are unaware of the link between tobacco and Age-related Macular Degeneration, which can cause complete vision loss, as the scientists recommend measures to better inform the public that smoking can lead to blindness.

http://www.channelnewsasia.com/stories/health/view/1155308/1/.html
http://www.todayonline.com/Science/EDC110924-0000959/Smoking-can-lead-to-blindness--Study