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Implant Contact Lenses and Laser Treatment for Eyes - Centre For Vision
Why do we wear Glasses or Contact Lenses?
Many people have 20:20 vision but this depends on three things; the curvature of your cornea, the focusing power of your lens, and the length of your eye. Any imbalance between these three will result in a focusing / refractive error. Refractive errors are measured in Dioptres (D).
There are three main types of refractive errors - short-sightedness (myopia), long-sightedness (hyperopia) and astigmatism. In these eyes the focusing power does not form a clear image on the retina (photographic layer) of the eye. The focusing / refractive error can be corrected by glasses or contact lenses to give clear vision.
The optician's prescription is written as below:
[+ / - Sphere] [+ / - cylinder] [axis]
Short-Sightedness (Myopia)
Myopia is when near objects are seen clearly but those in the distance are blurred. It occurs if the cornea is too steeply curved or if the eye is slightly longer than normal so that light is focused in front of the retina. Without glasses or contact lenses, short-sighted people are able to see objects clearly if held close to their eyes, but usually those objects beyond arms length are blurred or out of focus. This is a common eye problem affecting approximately one in five adults. Myopia is indicated with a minus sign (-) on prescriptions. This refractive error can be  corrected by laser and implants.

Long-Sightedness (Hyperopia)
Hyperopia occurs when the cornea is too flat for the size of the eye. This time light is focused beyond the retina so that close objects are blurred. Depending on their age, long sighted people may also have difficulty focusing on distant
objects as well. Hyperopia is indicated with a plus sign (+) on prescriptions. This refractive error can be corrected by laser and implants.
Astigmatism
This is when the eye has two different degrees of long (or short) sightedness combined. For example, vertical objects may be clear but horizontal ones blurred. No amount of focusing can give a completely clear image. Most people have a degree of astigmatism, which may co-exist with myopia or hyperopia. This is indicated as the cylinder (cyl) and will either have a + or a - sign in front of a number. This refractive error can be corrected by laser, implants and corneal microsurgery.
 


Laser vision correction
Multi-focal lens implants
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Keratoconus

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Contact us direct :
 
0161 276 5198
 
0161 276 5700
 
info@centreforvision.co.uk
Disclaimer - The information on our website is provided for informational purposes only and is not meant to replace a consultation with an eye care professional.If you think you have an eye condition then you must be properly assessed.
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