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History of Overnight Vision Correction (Orthokeratology)
The science of Orthokeratology which means ortho = straight; keratology = relating to the cornea, is not new - the thinking dates back to the ancient chinese who it is said used to sleep with sand bags over their eyes to correct their vision. The science of Orthokeratology however developed during the 1960s, but todays computer designed ortho k lenses have come a long way since then.
THE ORIGINS OF ORTHOKERSTOLOGY
Originally a series of different lenses had to be worn over many months to achieve vision correction and success was a bit hit and miss. The lenses could only be worn during the day and when the lenses were removed the effect would only last a few hours
MODERN ACCELERATED ORTHOKERSTOLOGY OR OVERNIGHT VISION CORRECTION
Today's orthokeratology lenses are worn only while sleeping and full correction is normally achieved with the first lens design.The correction effect lasts is designed to last at least 36hrs. The base material for the lenses is made by Bausch and Lomb and because of its very high oxygen permeability the lenses gained approval to be worn while sleeping.
This was a significant step forward as it was found that the stable pressure created by the eyelid during sleep significantly improved the effectiveness of the lenses. Hence the more sophisticated version of Orthokeratology is commonly reffered to as Accelerated Orthokeratology or Overnight Vision Correction.
There have been three further breakthroughs to make the patented i-GO OVC overnight contact lenses a unique new solution for short-sightedness.
- Computerised Corneal Topography - enabling opticians to generate a very accurate map of the eye surface.
- Advanced Computer Controlled Lathes - which can machine lenses to a sub-micron accuracy from these diagnostic maps .
- New Lens Materials - with a very high oxygen permeability (developed by Bausch and Lomb) allowing lenses to be worn safely overnight.
Find out if you could enjoy freedom from glasses and daytime contact lenses by filling in our one minute online suitability test
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