To have clear vision you basically need all the optical planets aligned, which for a lot of us doesn’t happen.
If light rays enter the eye are not precisely focused by both the cornea and the lens and then processed by the retina, you end up with blurred vision.
Lions Laser Vision Centre has treatments to correct many types of refractive errors that cause blurred vision.
Nearsightedness / Short-sightedness (Myopia)
If the cornea and lens are too strong, or if the eye is too long, then light will be focused in front of the retina. Objects in the distance are blurred but those closer are in focus.
Nearly 25% of people in Australia are myopic. This usually develops while the eye is still growing during childhood or adolescence and stabilises when full growth is reached.
No-one knows exactly what causes myopia but it is likely that both inherited and environmental factors play a role.
A LASIK laser eye treatment at Lions Laser Vision Centre would reshape the cornea and allow light rays to focus correctly on the retina.
Farsightedness / Long-sightedness (Hyperopia)
With Hyperopia objects in the distance are seen more clearly than those up close. This occurs if the cornea and lens are not strong enough, or the eye is too short, and light is focused behind the retina.
Younger people usually have enough power to see in the distance and up close, but as we get older glasses become necessary to see near objects and then later to see in the distance as well.
In the case of farsightedness, Lions Laser Vision Centre would steepen the cornea’s shape using their laser eye treatment. This causes the focusing point in the eye to move forward and match up with the surface of the retina.
Astigmatism refers to the condition where the cornea has different curvature. It does not have equally rounded curves like the side of a basketball, but has unequal curves, more like a football.
This makes focusing uneven or distorted and objects are not seen clearly without glasses whether they are up close or in the distance. Many people with myopia or hyperopia have some astigmatism as well.
It is common to see astigmatism associated with both nearsightedness and farsightedness. In the cases of astigmatism, Lions Laser Vision Centre would correct the far/nearsightedness as well as reshaping the cornea into a more spherical shape. This causes the focusing point in the eye to coincide with the surface of the retina.
This refers to the gradual inability to focus on near objects as we get older.
Presbyopia is often confused with hyperopia, (long-sightedness) however it is just part of the normal ageing process and occurs when the lens inside the eye gradually loses its ability to bring objects up close into focus. The effects can usually starts between 40 and 50 years of age.
Unfortunately LASIK cannot correct Presbyopia.
Other refractive problems
Other conditions such as keratoconus or corneal scars can affect the focusing of the eye but may not be able to be treated by LASIK, although other treatments may be available.