What should you know about super red eyes?

Redness happens when small blood vessels on the eye surface widen. Smoke, dust, chlorine, contact lenses, rubbing, and dry air can irritate the surface. Allergic conjunctivitis commonly presents with itchy, watery, often red eyes, while conjunctivitis may cause discharge and eyelid crusting. A sharply defined red patch can follow a broken surface vessel and may look dramatic without affecting vision. Redness with light sensitivity, marked pain, a foreign-body sensation, injury, or reduced vision is more concerning than redness alone.

Stop wearing contact lenses until an eye clinician says they are safe to resume. Do not rub the eye, share towels, or use leftover prescription drops. Rinse away a possible irritant with clean water, use a cool clean compress for itch, and wash hands before and after touching the face. Avoid driving if vision is blurred. A pharmacist or clinician can help choose suitable lubricating or allergy treatment, especially if symptoms keep returning.

Seek urgent medical assessment for severe eye pain, new vision loss or distortion, strong light sensitivity, a penetrating injury, chemical exposure, or redness with nausea or a severe headache. Contact an eye clinician promptly if a contact-lens wearer has pain, discharge, or blurred vision. Arrange a routine review if redness persists, recurs frequently, or is accompanied by ongoing discharge.

Could this be allergy, infection, dryness, or an eye-surface injury? Should I stop contact lenses, and which drops are appropriate? What symptoms would mean I need same-day eye assessment?