Millions of people in the UK are putting their sight at risk by continuing to smoke, warn specialists.
Smokers are twice as likely to lose their sight compared with non-smokers, says the RNIB.How smoking can harm your eyesFor 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 . Smokers are around three times more likely to get age-related macular degeneration - a condition affecting a person's central vision, meaning that they lose their ability to see fine details. And they are 16 times more likely than non-smokers to develop sudden loss of vision caused by optic neuropathy, where the blood supply to the eye becomes blocked.
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