If a patient reports discomfort with one specific eye but has identical lens parameters for both eyes, what should the practitioner do first?

The most appropriate initial action when a patient reports discomfort in one eye, despite having identical lens parameters for both eyes, is to check for foreign bodies in that eye. This step is critical because foreign bodies can cause significant discomfort, irritation, and potential damage to the eye. Identifying and removing a foreign body can provide immediate relief to the patient and address the discomfort directly.

Ensuring that no foreign particles are present helps rule out a common, easily identifiable cause of discomfort before moving on to further assessments or adjustments. If the discomfort persists after ensuring the eye is clear, then the practitioner can consider reassessing the lens fit or making adjustments to the prescription as needed.

This proactive approach prioritizes the health and comfort of the patient, ensuring that the issue is not a simple one that can be resolved quickly by addressing foreign material in the eye.