What is the role of contact lenses and laser Eye surgery in curing Eyesight problems?
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Answer:
Laser vision surgery is a popular treatment for vision problems. It reduces or eliminates the need for eyeglasses or contact lenses.
Laser procedures can help correct refractive errors. These are problems caused by an imperfectly shaped eyeball or cornea. The cornea is the clear part on the front of the eye that bends and focuses light. Refractive errors cause light from an object to be imprecisely focused on the retina of the eye. This causes a blurred image. Refractive errors often occur in otherwise healthy eyes.
These are the 4 basic types of refractive errors:
Nearsightedness (myopia). Close objects appear sharp, but those in the distance are blurred. The eyeball is longer than normal from front to back or the cornea is curved too much. Images focus in front of the retina instead of on it.
Farsightedness (hyperopia). Distant objects can be seen clearly, but objects up close are blurred. The eyeball is shorter than normal or the cornea is too flat. Images focus behind the retina.
Astigmatism. Objects are blurred at any distance. The cornea, lens, or both are shaped so that images aren't focused sharply on the retina.
Presbyopia or aging eye. The eye loses its ability to change focus because of the natural aging process. This often occurs between ages 40 and 50. Refractive surgery can't correct this problem. It can make distance vision clearer. But it may make near vision worse.
Explanation:
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Answer:
Laser vision surgery is a popular treatment for vision problems. It reduces or eliminates the need for eyeglasses or contact lenses.
Laser procedures can help correct refractive errors. These are problems caused by an imperfectly shaped eyeball or cornea. The cornea is the clear part on the front of the eye that bends and focuses light. Refractive errors cause light from an object to be imprecisely focused on the retina of the eye. This causes a blurred image. Refractive errors often occur in otherwise healthy eyes.
A contact lens is a synthetic lens that sits on the surface of the eye and helps correct vision problems such as long-sightedness, short-sightedness, presbyopia (the lens is unable to focus) and astigmatism (blurred vision)
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