Vision & Refractive Errors | Keratoconus | Cataract Surgery
Vision and refractive errors
Light enters the eye through the cornea (the curved clear window of the eye) and is focused on the retina. Ideally, the cornea should be perfectly dome-shaped. When it is out-of-shape, light bends at the wrong angle and images are not focused properly. This causes them to appear blurry or distorted. Problems with the focusing power of the eye are called refractive errors.
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There are three primary types of refractive errors: myopia, hyperopia, and astigmatism. In people with myopia (near-sightedness), the cornea is too curved, and items far away appear blurry. In those with hyperopia (farsightedness), the cornea is too flat, and items nearby and far away appear blurry. In people with astigmatism, the cornea is curved irregularly and items appear distorted. Spectacles and contact lenses are designed to compensate for visual imperfections – they bend the light before it enters the eye, helping the eye to focus.
We can treat many problems with vision and refractive errors
Normal Vision
The ability of an eye to focus on near and far objects without the aid of corrective lenses is described as normal vision.
Refractive Errors
If the image formed by the eye is not brought into sharp focus on the retina, but instead falls in front of it or behind it, this will result in a blurred image without glasses.
Myopia
In myopia, the eyeball is too long for the focusing system of the eye.
Hyperopia
Hyperopia, in contrast to myopia, is a condition wherein the image is focused behind the eye – in effect the eyeball is too short for the optical system either due to a small eyeball, that is usually 21 mm or less, or a cornea that is too flat and is therefore unable to bend the rays of light sufficiently to focus retina.
Astigmatism
Astigmatism refers to a condition of the focusing system of the eye where the principal focus lies in more than one place.
Presbyopia
The human crystalline lens matures throughout life, doubling its weight over a 90-year life span. It also doubles in thickness, becomes increasingly yellow, and inevitably develops cataracts at some point.
Contact us
Viewpoint Vision Services Ltd is an independent private clinic offering corrective eye surgery procedures with outstanding patient experience, exceptional surgeons, the latest techniques and technology, competitive all-inclusive prices, and comprehensive aftercare.
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For help with vision and refractive errors, just get in touch with our clinic to book an appointment with a specialist.
Some of our other treatments
Laser eye surgery
Laser eye surgery may help with conditions including short-sightedness, far-sightedness, astigmatism, and presbyopia.
Cataract surgery
Cataract surgery is one of the most common eye surgeries performed today. It is quick, safe and a great investment to improve the quality of your life.
Keratoconus
Keratoconus is a degenerative disorder of the eye in which structural changes within the cornea cause it to thin and change to a more conical shape than its normal gradual curve.
MIGS
A vitrectomy is a type of eye surgery to treat various problems with the retina and vitreous. Your surgeon will remove your vitreous and replace it with another solution.