LASIK for Hyperopia

LASIK for the Correction of Myopia, Hyperopia and Astigmatism

How do Myopia, Hyperopia and Astigmatism differ?

In the normal eye emmetropic eye, rays are bent by the cornea and the lens to focus on the retina. Myopia (nearsightedness), Hyperopia (farsightedness) and Astigmatism are conditions where rays of light do not focus on the retina and contact lenses or glasses are required. LASIK or PRK Surgery reshapes the cornea and reduces or eliminates the need for prosthetic optical devices is the condition where light rays focus in front of the retina.

Myopia


Light rays focus in front of the retina	The Myopic eye can see at near not at distance	Laser surgery flattens the cornea

Hyperopia


Light rays focus behind the retina	The Hyperopic eye can see at distance not near	Laser surgery steepens the cornea

Astigmatism


Two planes of light 90 degrees apart straddle the retina	The Astigmatic eye is often blurry at distance and at near	Laser surgery converts a football shaped cornea into a more spherical shape

Lasik Surgery - Stage I - Preparation


The cornea is prepared for the flap	Using a microkeratome, the flap is created	The flap is fully opened in preparation for the excimer laser

Lasik Surgery - Stage II - Ablation


Myopia ablation flattens the central cornea	Hyperopic ablation results in a steepening of the central cornea	Astigmatic ablation achieves a more spherical cornea

After Laser Ablation

The flap is repositioned. Excellent acuity is usually achieved by the following day.