A patient is found to need corrective lenses. Which diagnostic ...

[a0266361136]

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

Question 2

The nurse is assessing a patient's visual fields by covering the right eye with an opaque covering. The nurse should then perform which action?
 
  1. cover own right eye
  2. cover own left eye
  3. keep both eyes uncovered
  4. turn the lights on in the room before conducting this examination

[bpool94]

Answer to Question 1

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.

Answer to Question 2

Correct Answer: 2
The nurse asks the patient to cover one eye with the opaque cover while the nurse covers his or her own eye opposite the patient's. For example, if the patient covers the right eye, the nurse should cover the left eye. The nurse must have normal fields of vision to perform this examination. Covering the same eye, not covering either eye, or turning on the lights will not help assess the patient's visual fields.