AN opticians is urging people to be careful with wearing novelty contact lenses for Halloween in order to prevent a 'sight-mare'.

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Specsavers says people should avoid purchasing cheap products online, clean and store them properly to avoid infection, should not sleep in them and never share contact lenses with other people.

Sarah Marshall, Bicester Specsavers store director, said: "Halloween contact lenses have become incredibly popular over the last few years, however, consumers are often not aware of the risks associated with misusing contact lenses.

"In particular, if a wearer hasn’t had a proper consultation with an optometrist beforehand, they probably haven’t been taught how to wear or care for their lenses correctly.

"The results can be nasty and range from mildly irritating complications, such as blurry vision and conjunctivitis, to potentially sight-threatening conditions, such as fungal infections like microbial keratitis."