People who cannot wear ordinary contact lenses may be helped by new custom-made ones being developed in the US.
The work is being done by researchers at the University of Houston"s College of Optometry.
Dr Jason Marsack, a research assistant professor of optometry, said that one patient who has tried an early type of the lens has been "amazed".
Dr Raymond A Applegate, professor of optometry, explained that while everyone has aberrations in their eyes which are not completely correctable, this is not usually a problem.
He explained that the custom contact lenses, for people who cannot wear ordinary ones, are soft and have to stay aligned correctly during use and he predicted high demand for the product.
Another new type of contact lens technology is the Sulcoflex Multi-focal "piggyback" contact lens, which is placed over artificial eye lenses.
by Alexa Kaczka