Eyesight risk to smokers of more than 20 cigarettes
WASHINGTON: Smoking more than 20 cigarettes a day may damage your vision by affecting blood vessels and neurons in the retina, a study published in the journal Psychiatry Research, warns. It included 71 healthy people with normal or corrected to-normal vision. The findings indicated significant changes in the smokers’ red-green and blue-yellow colour vision, suggesting that consuming substances with neurotoxic chemicals in cigarettes may cause overall colour vision loss. They found that the heavy smokers had a reduced ability to discriminate contrasts and colours when compared to the non-smokers.