It is vital that any contact lenses people wear have been prescribed by professional and have been properly fitted, one specialist has advised.
Dr Thomas Steinemann, professor of ophthalmology at Case Western Reserve University in Cleveland, said that many people believe that some lenses do not require the same level of care or consideration because they can be purchased on the internet.
However, the expert pointed out that anything people place inside their eye should be an official product to minimise the risk of infection.
"In fact, permanent eye damage can occur from using over-the-counter lenses. Any type of contact lens is a medical device that requires a prescription and proper fitting by an eye care professional," he advised.
His comments follow advice issued by contact lens specialist Trina Vanaalst, who told 660 News that although there are many different types of coloured contacts lenses on the market, it is easy to opt for an unofficial supplier and consequentially experience problems after wearing them.
by Martin Burns