Smokers are twice as likely to lose their sight compared with non-smokers, says the RNIB.
That is because tobacco smoke can cause and worsen a number of eye conditions.
Cigarette smoke contains toxic chemicals that can irritate and harm the eyes.
For example, heavy metals, such as lead and copper, can collect in the lens – the transparent bit that sits behind the pupil and brings rays of light into focus – and lead to cataracts, where the lens becomes cloudy.
Smoking can make diabetes-related sight problems worse by damaging blood vessels at the back of the eye (the retina).
SOURCE: BBC News
