What should be assessed in a patient with red eye?

• A. Redness, discomfort, and vision loss.
• B. Redness only.
• C. Discharge color.
• D. Pupil size.

Answer: (A)

Assessing how the red eye relates to vision and comfort is the crucial first step. Redness is a nonspecific sign that can come from many causes, but whether vision is affected and how much pain or discomfort the patient has help distinguish benign surface issues from sight-threatening problems. If vision is preserved and discomfort is mild, conditions like simple conjunctivitis or dry eye are more likely. If vision is altered or there is significant pain, photophobia, or other urgent symptoms, this points to more serious etiologies such as corneal involvement, anterior chamber inflammation, or acute pressure-raising conditions, all of which require prompt evaluation.

Context matters too: discharge color, trauma, contact lens use, and light sensitivity can guide the differential, but the most actionable assessment is vision status and the level of discomfort. Early recognition of any vision change is the key to deciding urgency and referral.