Which statement about LASIK is true?

Which statement about LASIK is true?

• A. It replaces the entire lens
• B. It treats glaucoma
• C. It increases tear production permanently
• D. It reshapes the cornea to correct refractive errors

Answer: (D)

Shaping the cornea to correct refractive errors is what LASIK does. By making a precise adjustment to the corneal curvature with laser, the way light is focused onto the retina is improved, reducing or eliminating dependence on glasses or contacts for nearsightedness, farsightedness, or astigmatism. The procedure does not replace the entire lens—that would be cataract surgery—nor does it treat glaucoma, which is a disease of the optic nerve and intraocular pressure. It also does not permanently increase tear production; in fact, LASIK can cause dry eye symptoms for some people, at least temporarily, rather than increasing tear production.

Shaping the cornea to correct refractive errors is what LASIK does. By making a precise adjustment to the corneal curvature with laser, the way light is focused onto the retina is improved, reducing or eliminating dependence on glasses or contacts for nearsightedness, farsightedness, or astigmatism. The procedure does not replace the entire lens—that would be cataract surgery—nor does it treat glaucoma, which is a disease of the optic nerve and intraocular pressure. It also does not permanently increase tear production; in fact, LASIK can cause dry eye symptoms for some people, at least temporarily, rather than increasing tear production.