Continuous wear contact lenses

There have been several previous attempts to allow lenses to be worn overnight safely. However, these lenses have prevented enough oxygen passing through to the eyes, resulting in a higher risk of serious eye infection. Recently, new 'silicone-hydrogel' lenses have significantly improved oxygen transmission and current research suggests they are no less safe than daily wear soft contact lenses. Theses lenses can be worn overnight and for up to a month without removal. Some eyes are not suitable for this type of lens and even if you are, regular checks of the health of the eye are essential. The lenses are usually fitted as daily wear lenses and if the eyes show no sign of ill effects, overnight wear is commenced.