A client states, "I am legally blind." Which assessment technique should the nurse use to obtain subjective data to support the client's statement?

A. Observing pupillary response to a penlight helps assess the neurological function related to the eyes, such as reaction to light, but it does not directly assess the client's overall visual acuity or support the claim of being legally blind. B. Examining the optic disc can help identify structural changes in the eye, such as damage to the retina or optic nerve, but it doesn't directly assess the client’s claim of being legally blind or the extent of visual impairment. C. Assessing eye movements can help evaluate for conditions such as strabismus or cranial nerve abnormalities, but it doesn't provide a direct assessment of visual acuity or support the client’s statement of blindness. D. The Snellen chart is a standard tool for assessing visual acuity and is the most appropriate method to objectively measure whether the client has the visual impairment consistent with being legally blind.