Far-sightedness
If an eye is too short, light rays are focused on a point behind the retina when looking into the distance. This results in a blurred image. Until presbyopia occurs with old age, the lens' ability to adjust (accommodation) can produce a sharp image which compensates for far-sightedness. As the ability of accommodation fades with age, however, so too does the ability to compensate. Far-sightedness can be corrected with glasses or contact lenses with a convex form. It can lead to strabism in children's eyes if not corrected early enough.
Treatment with a Holmium Laser or with an Excimer-Laser can "steepen" the cornea, which leads to an artificial near-sightedness and compensates the far-sightedness.
If an eye is too short, light rays are focused on a point behind the retina when looking into the distance. This results in a blurred image. Until presbyopia occurs with old age, the lens' ability to adjust (accommodation) can produce a sharp image which compensates for far-sightedness. As the ability of accommodation fades with age, however, so too does the ability to compensate. Far-sightedness can be corrected with glasses or contact lenses with a convex form. It can lead to strabism in children's eyes if not corrected early enough.
Treatment with a Holmium Laser or with an Excimer-Laser can "steepen" the cornea, which leads to an artificial near-sightedness and compensates the far-sightedness.