A patient is found to need corrective lenses. Which diagnostic test was most likely used to determine this finding?
1. computed tomography (CT) scan
2. tonometry
3. refractometry
4. response to atropine eye drops
Correct Answer: 3
Refractive errors, with prescription for corrective lenses, are evaluated by retinoscopy and/or refractometry. Pupils must be dilated for accurate diagnosis. A computed tomography (CT) scan is used to assess structures. Tonometry is used to assess ocular pressure. The patient's response to atropine drops would not be used to evaluate the need for corrective lenses.
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