Final answer:
Refer the person with abnormal pupil response to an eye specialist, as it could signify a medical issue. Wearing sunglasses without UV protection increases the UV hazard to your eyes, as dilated pupils let more UV light in.
Step-by-step explanation:
If one or both pupils have a sluggish or abnormal response to light, the appropriate action to take is to refer the person to an eye specialist. This could be indicative of a range of issues, potentially involving the optic nerve or the oculomotor nerve, and requires professional assessment and diagnosis. Conducting a hearing test, ignoring it, or prescribing sunglasses for constant use would not be appropriate responses to this situation.
Regarding the use of sunglasses without UV blockers, it's important to understand the relationship between visible light and UV radiation. When visible light intensity is reduced, such as when putting on sunglasses, the pupils dilate to allow more light in to maintain clear vision. However, if sunglasses lack UV blockers, they might still reduce the amount of visible light reaching the eyes, causing the pupils to dilate without offering protection against UV light. Thus, wearing such sunglasses could potentially increase the UV hazard to your eyes because the dilated pupils would allow more UV radiation to enter.