While taking a history on an older adult male client, his wife reports that he is having increasing periods of short-term memory loss and he occasionally gets confused. How should the nurse proceed with an assessment of the client's sensory system?

A. Observe the client's eye movements through the cardinal fields of vision: This test evaluates extraocular muscle function and cranial nerves III, IV, and VI. It helps detect muscle weakness or nerve damage but does not measure visual acuity or diagnose legal blindness.

B. Observe the client's pupillary response to a penlight: This assesses the integrity of the optic and oculomotor nerves and reflexes, such as pupil constriction. While useful in neurological assessments, it does not determine the level of visual acuity needed to confirm legal blindness.

C. Observe the client's optic disc through an ophthalmoscope: Direct visualization of the optic disc can reveal issues like glaucoma or optic atrophy. However, it does not quantify vision loss or determine functional blindness as defined by acuity measurements.

D. Assess the client's ability to read a Snellen chart from a distance of 20 feet: This is the standard method for evaluating visual acuity. Legal blindness is defined in the U.S. as visual acuity of 20/200 or worse in the better eye with corrective lenses, making this test the most appropriate for supporting the client’s statement.

A. Explain the tests to the wife so she can interpret them for her husband: While involving family members can be helpful in some situations, it is essential for the client to actively participate in sensory assessments. Having the wife interpret the tests may not give an accurate representation of the client’s sensory capabilities.

B. Assess the client's ability to follow directions before proceeding with the exam: Accurate sensory testing relies on the client's ability to understand and follow instructions, as well as to accurately report sensations. It is important to first evaluate whether the client can understand and follow instructions, as cognitive or memory issues may affect their ability to engage in the sensory exam. This step ensures that the assessment results are valid and reflective of the client’s true sensory function.

C. Defer this part of the exam because the results are likely to be invalid: While cognitive decline can impact the reliability of the exam, it is essential to assess the client's ability to participate and follow instructions before determining whether the sensory exam can be conducted properly. Deferring the exam without evaluation of comprehension is inappropriate.

D. Perform the tests because the client's mental status does not affect sensory status: While mental status may not directly affect the sensory pathways, the ability to follow directions and focus on the exam does influence the accuracy of the assessment. Proceeding without assessing the client's ability to participate could result in inaccurate findings.