Legal highs linked to central vision loss

Poppers, otherwise known as legal highs, have been linked to central vision loss and metamorphopsia - experienced by a 52-year-old man who inhaled them for the first time.

In an article published in BMJ Case Reports, doctors who treated the man said he had been experiencing 10-days of visual problems, which began immediately after taking the drugs, prior to hospital admission.

Doctors found disruption of the inner and outer segment layers of the fovea, and advised the man to stop taking the drugs. After three months there were improvements in the photoreceptor layer, but visual acuity increase was marginal.