Which ocular symptom constitutes a red flag that requires urgent ophthalmology assessment?

• A. Mild eye redness
• B. Watering
• C. Reduced visual acuity
• D. Itchy eye

Answer: (C)

A drop in visual clarity signals a potential sight-threatening eye problem and requires urgent ophthalmology assessment. Sudden or new reduced visual acuity can indicate conditions like retinal detachment, optic nerve issues, corneal ulcers, or acute glaucoma, where prompt evaluation is essential to prevent permanent vision loss.

Mild eye redness, watering, and itching are more commonly due to benign or chronic conditions such as conjunctivitis, dry eye, or allergic reactions and do not by themselves imply an urgent emergency unless accompanied by vision change, severe eye pain, trauma, or other red flags. If reduced visual acuity is reported, arrange prompt ophthalmology referral or emergency care.