Question
When an ophthalmologist surgically corrects a patient's vision through LASIK or PRK, the doctor is making adjustments to the patient'sa. cornea.c. retina.b. lens.d. iris.
Step 1
The cornea is the front dome of the eye that allows light in and bends it to focus on the retina. The retina is the back part of the eye that receives information from the outside world and sends it to the brain for interpretation. The pupil is the gap that Show more…
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Correction for farsightedness usually requires ______. a. a concave lens b. a convex lens c. laser surgery to reshape and smooth the cornea d. a carefully crafted lens that matches the contours of the cornea
(a) A laser vision correction reshaping the cornea of a myopic patient reduces the power of his eye by 9.00 D, with a $±5.0%$ uncertainty in the final correction. What is the range of diopters for spectacle lenses that this person might need after LASIK procedure? (b) Was the person nearsighted or farsighted before the procedure? How do you know?
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