Quick answer. Most eye pain comes from minor causes such as dry eye, eye strain, conjunctivitis, a stye or a foreign body. The biggest red flag is sudden severe eye pain with blurred vision, halos around lights and nausea, which can signal acute glaucoma, a sight-threatening emergency needing immediate care.
Eye pain ranges from mild irritation and grittiness to severe, sight-threatening conditions. In Singapore, long hours on screens, contact lens wear, air-conditioning and our dusty, hazy environment make dry eye, strain and surface irritation extremely common.
Most causes are minor and settle quickly, but some forms of eye pain are genuine emergencies that can threaten your sight. Knowing which is which helps you act fast when it matters. This guide explains the common causes, the warning signs, and when to see an eye specialist.
At a glance
| Cause | Typical features | What to do |
|---|---|---|
| Dry eye / eye strain | Gritty, tired, worse with screens or aircon | Rest eyes, lubricating drops, screen breaks |
| Conjunctivitis | Redness, discharge, itching, often both eyes | See a doctor; very contagious if infective |
| Foreign body / abrasion | Sharp pain, watering, feeling of something in eye | Do not rub; see a doctor if it persists |
| Stye | Tender red lump on the eyelid edge | Warm compresses; see a doctor if spreading |
| Acute glaucoma | Sudden severe pain, blurred vision, halos, nausea | Go to A&E immediately – emergency |
Red flags: when to seek urgent care
Get emergency eye care immediately if you have:
- Sudden severe eye pain with blurred vision, halos around lights and nausea or vomiting – this may be acute angle-closure glaucoma, a sight-threatening emergency
- A chemical splash in the eye – irrigate with clean water for at least 15 minutes and go straight to A&E
- Eye pain in a contact lens wearer with redness and light sensitivity – possible corneal infection that can scar your sight
- Eye injury with penetrating trauma, or sudden loss of vision
For severe, sudden or vision-threatening symptoms, go to the nearest A&E or eye emergency service. Call 995 if you cannot get there safely or feel very unwell.
Dry eye and eye strain
Dry eye and digital eye strain are the most common causes of eye discomfort in Singapore. Long screen time reduces blinking, and air-conditioning dries the tear film, leaving eyes gritty, tired, watery or mildly sore, often worse by the end of the day.
Relief usually comes from regular screen breaks (the 20-20-20 rule), lubricating eye drops, blinking more and adjusting aircon and screen position. If symptoms persist despite these measures, an eye specialist can assess your tear film and rule out other causes.
Conjunctivitis, styes and lid problems
Conjunctivitis (“red eye”) causes redness, discharge and itching, and is often very contagious when caused by a virus or bacteria. A stye is a tender red lump on the eyelid edge from a blocked gland, usually helped by warm compresses.
These conditions are common and usually not serious, but see a doctor if there is significant pain, light sensitivity, blurred vision, or if a stye or lid infection is spreading. Good hand hygiene helps prevent spreading infective conjunctivitis to others.
Foreign body, abrasion and contact lens infections
A foreign body (dust, grit, an eyelash) or a scratch on the surface (corneal abrasion) causes sharp pain, watering and a feeling of something in the eye. Do not rub the eye. Gentle flushing with clean water or saline may help, but persistent pain needs a doctor.
Contact lens wearers must take eye pain seriously. Pain, redness and light sensitivity in a lens wearer can mean a corneal infection (microbial keratitis), which is urgent because it can scar the cornea and threaten vision. Remove the lens and seek same-day eye care.
Acute glaucoma, uveitis and other serious causes
Acute angle-closure glaucoma causes sudden, severe eye pain with blurred vision, halos around lights, a red eye and nausea or vomiting. It is a true emergency, as a rapid rise in eye pressure can permanently damage sight within hours. Go to A&E immediately.
Uveitis (inflammation inside the eye) causes a painful red eye with light sensitivity and blurred vision and needs prompt specialist treatment. Deep, aching eye pain can also be referred from the sinuses. Any deep eye pain with vision changes should be assessed by an eye specialist.
Which specialist should you see?
For mild dryness, strain or a simple stye, self-care or a GP is usually enough. See an eye specialist (ophthalmologist) urgently for sudden severe pain, vision loss, halos, a chemical splash, eye injury, or any eye pain in a contact lens wearer. Browse our list of best eye specialists in Singapore to get assessed.
Looking after sore, tired eyes at home
For everyday dryness and strain, small habits make a real difference. Follow the 20-20-20 rule: every 20 minutes, look at something about 20 feet away for around 20 seconds. Blink fully and often, especially during screen work, and position your screen slightly below eye level to reduce exposure of the eye surface. Preservative-free lubricating drops can be used several times a day. Direct air-conditioning and fans away from your face, and consider a warm compress over closed eyelids if your eyes feel gritty.
Take contact lens hygiene seriously: wash your hands before handling lenses, never sleep in lenses unless they are designed for it, replace them as directed, and never rinse them or your case in tap water. Remove your lenses at the first sign of redness or pain.
How to prepare for your appointment
Note when the pain started, whether it affects one or both eyes, and what makes it better or worse. Tell the doctor if you wear contact lenses, had any injury or chemical splash, or notice vision changes, halos, light sensitivity or discharge. If your vision is affected, arrange for someone to accompany you, as your eyes may need drops that blur sight temporarily.
Common questions
Are over-the-counter redness-relief drops safe to use daily?
Drops that whiten the eye are different from lubricating drops and are not meant for long-term daily use, as they can cause rebound redness. For ongoing dryness, choose a lubricating (artificial tear) drop instead.
When is eye pain an emergency?
Sudden severe pain with blurred vision, halos and nausea, a chemical splash, an eye injury, or pain with redness in a contact lens wearer all need same-day or emergency eye care.
Can sinus problems cause eye pain?
Yes, sinus congestion can cause a deep, aching pain around or behind the eye. If it comes with vision changes, have it assessed.
Related guides
- Best Eye Clinics in Singapore — our editorial shortlist
- eye clinics directory
- ENT specialists
- Dermatologists
- GP clinics
Sources
- NHS – Eye pain
- HealthHub Singapore – Glaucoma
- SingHealth – Acute Angle Closure Glaucoma
- Mayo Clinic – Eye pain
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