Ingredient in Viagra can permanently affect sight, doctors warn

Viagra may cause loss of vision in men with retinitis pigmentosa Retinitis pigmentosa is a rare inherited eye condition causing sight loss Some people have normal vision but carry one gene for the condition Ingredient in Viagra linked to degenration and death of cells in the retina People with retinitis pigmentosa and those who carry the gene at risk

By Madlen Davies for MailOnline

Published: 05:36 EST, 1 October 2014 | Updated: 09:11 EST, 1 October 2014

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Viagra could cause blindness in men with eye problems, and even those with seemingly normal vision, a new study has found.

Australian researchers say an ingredient in anti-impotence drugs may permanently affect the vision of men with an inherited eye condition.

It could also affect those with normal sight who carry one gene which is linked with developing eye problems.

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Ingredient in Viagra can permanently affect sight, doctors warn