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Toxins in e-cigarettes could cause damage to the user’s eyesight, a US study suggests.

People who use the devices, or “vape”, were 34 per cent more likely to suffer from visual impairments compared with those who had never tried e-cigarettes, while former users were 14 per cent more likely, researchers from the University of California found. The study assessed 1,173,646 adults aged between 18 and 50 between 2016 and 2018. They were asked in a questionnaire if they smoked or vaped, and if they suffered from visual impairment.