A red eye is one of the most common reasons people seek urgent eye care. But "red eye" is not a diagnosis — it is a symptom that can mean anything from a burst blood vessel (harmless) to acute angle-closure glaucoma (an emergency that can cause permanent blindness within hours).
The critical question is not just is my eye red? but is there pain, and how bad is the pain? The presence or absence of pain, along with associated symptoms, tells us a great deal about how urgent the situation is.
Sudden painful red eye in Auburn?
Call us immediately on (02) 9761 0005. Do not wait to see if it improves — same-day assessment, no referral needed.
Red Eye WITH Pain: Treat as Urgent
Iritis (Anterior Uveitis)
Iritis is inflammation inside the eye — specifically of the iris. It causes a deep aching or throbbing pain, significant light sensitivity, and a red eye that is worst near the limbus (the junction between the coloured iris and the white of the eye). There is usually no discharge.
Iritis can recur and, if untreated, leads to complications including synechiae (adhesions inside the eye), raised intraocular pressure, and cataract formation. It requires steroid eye drops and close monitoring. Dr Tahiri can prescribe these directly.
Acute Angle-Closure Glaucoma
This is a genuine emergency. Sudden, severe eye pain — often throbbing, with a headache on the same side — combined with blurry vision, halos around lights, nausea, and a fixed mid-dilated pupil indicates a dramatic rise in intraocular pressure. Call 000 or go to emergency immediately if you cannot reach us.
Corneal Ulcer
A corneal ulcer is a bacterial or fungal infection of the cornea, often linked to contact lens overwear, poor contact lens hygiene, or a previous corneal abrasion. The eye is painful and red, with photophobia and sometimes a white or grey spot visible on the cornea. This requires urgent antibiotic treatment to prevent scarring and vision loss.
Corneal Abrasion
A scratched cornea causes intense pain, tearing, and a red eye. See our full guide on corneal abrasion treatment.
Red Eye WITHOUT Pain: Usually Less Urgent
Subconjunctival Haemorrhage
A bright red patch on the white of the eye that appears suddenly, with no pain and no change in vision. This is a burst blood vessel under the conjunctiva — alarming in appearance but usually harmless. It resolves within 1–3 weeks. No treatment is required unless it recurs frequently (which warrants investigation of blood pressure or clotting).
Viral Conjunctivitis
Very common, very contagious. Typically starts in one eye and spreads to the other within 1–2 days. Associated with a recent cold or upper respiratory infection. Eyes are watery and uncomfortable but not severely painful. Treatment is supportive — antibiotic drops do nothing against a virus. We identify the type and advise accordingly.
Bacterial Conjunctivitis
Sticky, yellow-green discharge, especially overnight. Usually more comfortable than viral conjunctivitis. Responds well to antibiotic drops prescribed by Dr Tahiri — no GP visit required.
Allergic Conjunctivitis
Itchy, watery, red eyes with no discharge — often seasonal. Treated with antihistamine drops, which Dr Tahiri can prescribe.
The Rule of Thumb
A red eye with significant pain, light sensitivity, or change in vision needs same-day assessment. A red eye that is not painful and has no vision change can be assessed within 24–48 hours — but still call us to confirm.
Call Prime Optometrists Auburn on (02) 9761 0005 and we will triage you immediately. We see red eye cases the same day from Auburn, Lidcombe, Granville, Parramatta, Silverwater, and all of Western Sydney.