The Most acceptable options for Specs removal are summarized below:
Power of Glasses
Choice of Procedure
-1 to -8
LASIK, LASER Procedures
-8 to -18
ICL
+1 to +8
LASIK, LASER Procedures
+5 to +10
ICL or RLE
The eye and vision errors
The cornea is a part of the eye that helps focus light to create an image on the retina. It works in much the same way that the lens of a camera focuses light to create an image on film. The bending and focusing of light is also known as refraction. Usually the shape of the cornea and the eye are not perfect and the image on the retina is out-of-focus (blurred) or distorted.
These imperfections in the focusing power of the eye are called refractive errors. There are three primary types of refractive errors: myopia, hyperopia and astigmatism. Persons with myopia, or nearsightedness, have more difficulty seeing distant objects as clearly as near objects. Persons with hyperopia, or farsightedness, have more difficulty seeing near objects as clearly as distant objects. Astigmatism is a distortion of the image on the retina caused by irregularities in the cornea or lens of the eye. Combinations of myopia and astigmatism or hyperopia and astigmatism are common.
Glasses or contact lenses are designed to compensate for the eye's imperfections. Surgical procedures aimed at improving the focusing power of the eye are called refractive surgery. In LASIK surgery, precise and controlled removal of corneal tissue by a special laser reshapes the cornea changing its focusing power.
Understanding the Need for Refractive Correction
Your ability to see depends on the way that your eyes bend (refract) light. A refractive error occurs when they do not bend it perfectly, preventing the eye from focusing light correctly. Common refractive errors can be corrected with glasses and contact lenses temporarily but surgery improves them permanently.
Rays of light can bend when they pass through water or a cornea such as the clear front surface of your eye. An abnormally shaped cornea bends the light imperfectly leading to a refractive error. Anatomical features affect the ability of your eyes to refract light and focus properly.
Below are the factors that can cause refractive errors:
Eye Length: While it may not seem to you that the shape of your eye is too long or too short, either condition can affect your vision. You may have nearsightedness if it is too long or farsightedness if it is too short.
Curvature of the Cornea: The lens on the front of your eye needs to maintain an entirely spherical shape to refract a proper image. Refractions from irregular cornea shapes can produce astigmatism.
Curvature of the Lens: When the curve of the lens conforms to the shape of your cornea and the eye length, there is no refractive error. However, a lens that is too flat causes farsightedness, and a curve that is too steep may produce nearsightedness types of problems.
The cornea is a part of the eye that helps focus light to create an image on the retina. It works in much the same way that the lens of a camera focuses light to create an image on film. The bending and focusing of light is also known as refraction. Usually the shape of the cornea and the eye are not perfect and the image on the retina is out-of-focus (blurred) or distorted.