Astigmatism is a treatable curvature of the eye caused by blurred vision. When the front surface of the (cornea) lens is different than the other side it is known as astigmatism. There are different kinds of astigmatism, corneal astigmatism has a distorted shape; lenicular astigmatism is when the lens is distorted, both cause blurred vision.
Vision blurriness causes in both nearsighted and farsighted, and often it is present at birth. Astigmatism is always just a condition you have to deal with; it gets neither worse nor better over time. It is usually, not bad enough to require astigmatism surgery.
Some symptoms of astigmatism
- Distortion in portions of your visual field
- Blurring of vertical, horizontal or diagonal lines
- Eyestrain or fatigue
Different kinds of vision problems
If the cornea or lens isn't smooth,
and curved the light can't get in causing astigmatism problems. Blurred vision
is usually more in one direction than in another. Astigmatism is in conjunction
with other eye problems.
Myopia is nearsightness, which causes a curved cornea making an eye not normal. Light is on the retina causing blurriness. Hyperopia is farsightness, which causes your cornea not to be curved enough. In general astigmatism isn't caused by eye injury, reading in the dark, squinting or sitting too close to the television.
If eye astigmatism interacts with your quality of life, there are ways to improve your eye sight. Consult an eye doctor. He can tell how bad your astigmatism is, giving more options to correct your vision. Most adults have their eyes checked every 2-4 years, if you have astigmatism you may have to have them checked more often.
There are tests that can be done to check to see how bad your eyes are. A kerotometer checks the cornea for astigmatism, measuring the amount of light reflected. Keratoscope and videokeratoscope, detects the curvature of cornea and presence of astigmatism. A keratoscope with a video camera is quite common and it shows changes in the cornea. The goal is to correct the vision either by corrective lenses or contact lenses for astigmatism to improve the curvature of the eye.
Treatment for astigmatism
There are many forms of astigmatism treatment. Lasik surgery is one kind of Refractive astigmatism surgery. The eye surgery doctor makes a hinged cut on the cornea, which also can be done with a laser. Photorefractive keratectomy or PRK is another astigmatism surgery which removes protective layer of the cornea before using a laser to change the curvature of the cornea. Another surgery is Laser-assisted subepithelial keratomileusis (LASEK) a thinner layer than the others of the cornea is folded back; Lasek may be a better option for people with thinner corneas as they are more vulnerable to damage. Radial keratotomy is a surgery that was performed a lot in the past. It caused farsightness after initial good results, whis is not done as much anymore though.