Final answer:
The nurse should use the assessment for Visual Acuity to identify the client's safety needs.
Step-by-step explanation:
The nurse should use the assessment for Visual Acuity to identify the client's safety needs. Visual acuity is a measure of how well a person can see objects at a specific distance. The Snellen chart is commonly used to test visual acuity and involves reading letters of different sizes from a specific distance.
Assessing pupil clarity, while important for other purposes, does not directly assess a client's risk for falls. Similarly, hearing acuity is not directly related to the risk of falls. While visual fields are important in assessing overall vision, they do not specifically assess the client's safety needs in terms of fall risk.