Jacqui Mayhew 

Overnight contact lenses  are a new form of contact lens which are worn only while sleeping and correct short-sightedness - otherwise known as myopia - so that after removing the lenses each morning the wearer enjoys perfect natural vision all day long. The effect lasts for over 24 hours so the perfect vision lasts until the lenses are reinserted at night. And because the lenses are not worn during the day, they could be the answer to the rapidly growing problem of Computer Vision Syndrome (CVS) where daytime contact lens wearers are finding their eye health affected by staring too long at computer screens - usually in climate-controlled work and home environments.

CVS encompasses a group of eye and vision related problems that result from prolonged computer use and while they are not thought to be permanent, symptoms of CVS are generally unpleasant and cause discomfort. The level of discomfort naturally increases with ongoing and continued use of the computer and the most common symptoms are eyestrain, blurred vision and dry, itchy or burning eyes, which will often culminate in a headache or migraine. However, of greater consequence is the fact that CVS is also thought to be having an impact on the global incidence of myopia. Hence, the potential importance of overnight contact lenses  which are based on the long-established optical science of orthokeratology.

Greatly reduced blink rates from staring at screens means that the eye is insufficiently lubricated and given that air conditioning is drawing moisture from the air this problem is exacerbated. Hence, many daytime contact lens wearers complain of severe comfort issues and in the worst cases such issues are a significant cause of drop-out from lens wear. With overnight contact lenses , they only need to be worn for the normal duration of sleep - typically 6-8 hours - and not at all during daytime whether in the office or at home so they are not affected by the dry eye problem associated with daytime contact lens wear.