To assess a client’s pupillary reaction to accommodation, what action should the nurse take?
A.
Observe pupil size when focusing on a near object and then a far object.
B.
Compare the shape of each of the pupils bilaterally with normal room light.
C.
Note the speed of pupil constriction when a penlight is shined into the eye.
D.
Determine if dilation of the pupils occurs when the room is darkened.
The correct answer and Explanation is :
The correct answer is A. Observe pupil size when focusing on a near object and then a far object.
Explanation:
Pupillary reaction to accommodation involves observing how the pupils adjust in response to focusing on objects at different distances. Accommodation is the eye’s ability to focus on near and far objects, and this process includes changes in pupil size. Here’s a detailed explanation of why option A is the correct answer:
1. Definition of Accommodation:
Accommodation is the process by which the eye changes its focus from distant to near objects. This involves both the lens and the pupils. When focusing on a near object, the pupils constrict (become smaller), and when focusing on a far object, the pupils dilate (become larger). This change in pupil size helps to improve the depth of focus and clarity of the image on the retina.
2. Action Required:
To assess this, the nurse should observe the pupil size while the client focuses on a near object (such as a pen held close to the eyes) and then on a far object (such as something across the room). This allows the nurse to see how the pupils constrict with near vision and dilate with distance vision, which is a normal and healthy response.
3. Alternative Options:
- B involves comparing the shape of the pupils, which is more related to assessing for symmetry and possible deformities, not specifically accommodation.
- C pertains to assessing the pupillary light reflex rather than accommodation. It focuses on how pupils respond to light.
- D involves observing the pupils’ response to changes in light conditions, which is related to the light reflex rather than accommodation.
Thus, observing pupil size changes with near and far focus directly assesses the accommodation response, making option A the appropriate choice for evaluating this aspect of pupillary function.