Laser vision correction

Definition

Laser vision correction is a medical procedure that uses lasers to reshape the cornea, improving the eye's ability to focus light on the retina. This process corrects refractive errors such as myopia, hyperopia, and astigmatism.

5 Must Know Facts For Your Next Test

1. The most common types of laser vision correction are LASIK (Laser-Assisted in Situ Keratomileusis) and PRK (Photorefractive Keratectomy).
2. The cornea is reshaped by precisely removing microscopic amounts of tissue using an excimer laser.
3. Laser vision correction can reduce or eliminate the need for glasses or contact lenses.
4. Patients typically experience improved vision within 24 hours after the procedure, with full recovery taking a few weeks.
5. Understanding the interaction between laser light and corneal tissue is crucial for achieving accurate corrections.

Review Questions

Related terms

Myopia: A refractive error where close objects appear clearly, but distant ones are blurry. Often corrected by concave lenses or laser surgery.

Hyperopia:

A refractive error where distant objects can be seen more clearly than close ones. Typically corrected by convex lenses or laser surgery.

Astigmatism:

A condition in which the eye does not focus light evenly onto the retina due to an irregularly shaped cornea. Corrected using cylindrical lenses or laser surgery.