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A patient receives a rigid IOL whose focus cannot be
Chapter 27, Problem 107PP(choose chapter or problem)
Problem 107PP
A patient receives a rigid IOL whose focus cannot be changed—it is designed to provide clear vision of objects at infinity. The patient will use corrective contacts to allow for close vision. Should the refractive power of the corrective contacts be positive or negative?
Questions & Answers
QUESTION:
Problem 107PP
A patient receives a rigid IOL whose focus cannot be changed—it is designed to provide clear vision of objects at infinity. The patient will use corrective contacts to allow for close vision. Should the refractive power of the corrective contacts be positive or negative?
ANSWER:
Solution 107PP
Step 1 of 2
Here we need to determine whether the refractive power of the corrective contacts should be positive or negative. If the patient has to use corrective contacts to get the clear vision of objects at infinity.
The corrective contacts should be convex lens in order to allow close vision. The image will be produced at the focal length of the convex lens when the object is at infinity.