The tearing or red-eyed infant
- Clinical approach
Most watery or red eyes in babies are a blocked tear duct or conjunctivitis. Light sensitivity with a large, cloudy cornea means congenital glaucoma.
See it in 3D: Cornea · Tear drainage
What it is
In infants and young children, a watery or red eye is common and usually benign: a blocked tear duct, viral or bacterial conjunctivitis, or a scratch from a fingernail. A few causes threaten sight or life and must be recognised early: neonatal gonococcal conjunctivitis, congenital glaucoma, orbital cellulitis and, in a child with prolonged fever, Kawasaki disease.
Red flags
- Tearing with light sensitivity, squeezing of the lids and a large or cloudy cornea: congenital glaucoma.
- Red, very purulent eye in the first week of life: gonococcal conjunctivitis.
- Fever, swollen lid, painful or limited eye movements: orbital cellulitis.
- Fever for five days or more with red eyes without discharge: Kawasaki disease.
- White pupil or a new squint with a red eye: retinoblastoma.
Step-by-step approach
- Ask the age at onset, discharge, light sensitivity, fever and contacts with infections.
- Look at the size and clarity of each cornea and compare the eyes.
- Look for discharge, lid swelling and a mucus reflux from the tear sac on pressure.
- Stain with fluorescein if a scratch is possible.
- Check the red reflex and the general state of the child.
Causes of a tearing or red eye in infants
| Cause | Clue | Urgency |
|---|---|---|
| Congenital nasolacrimal duct obstruction | Watery, sticky lashes, white eye | Routine |
| Viral or bacterial conjunctivitis | Red, discharge, often both eyes | Routine |
| Neonatal conjunctivitis | First month, purulent | Same day; emergency if hyperacute |
| Corneal abrasion | Sudden, crying, fluorescein stain | Same day if not healing |
| Congenital glaucoma | Photophobia, large cloudy cornea | Urgent |
| Orbital cellulitis | Fever, proptosis, limited movements | Emergency |
| Kawasaki disease | Prolonged fever, non-purulent red eyes | Urgent paediatric care |
Keys to the differential
- Congenital glaucoma enlarges the eye because the infant's sclera stretches with pressure; it is easily mistaken for a blocked duct.
- Kawasaki conjunctivitis spares the limbus and has no discharge.
- Ophthalmic drops for adults should not be used in infants without specialist advice.
Next step / Initial management
- Blocked duct with a white eye: sac massage and lid hygiene; refer if it persists beyond about 12 months.
- Photophobia with a large or cloudy cornea: urgent paediatric ophthalmology for congenital glaucoma (surgery).
- Neonatal conjunctivitis: same-day assessment with cultures and systemic treatment as indicated.
- Fever with proptosis or limited eye movements: admission and intravenous antibiotics; prolonged fever with red eyes: assess for Kawasaki disease.
Test yourself
Think of the answer, then tap the question to see it.
Which signs in a tearing infant suggest congenital glaucoma?
Light sensitivity, squeezing of the lids and a large or cloudy cornea.
How does the conjunctivitis of Kawasaki disease look?
Bilateral red eyes without discharge, sparing the area around the cornea, in a child with prolonged fever.
When is a blocked tear duct in an infant referred?
If it persists beyond about 12 months, or earlier if there is infection or doubt about the diagnosis.
Connections
See it in 3D2
The structures of Durgical's 3D anatomy where it is found.
Educational content; not a clinical guideline and no substitute for assessment by a health professional. For sudden visual loss, severe eye pain, a chemical burn or an eye injury, go to an emergency department at once.
Sources: Primary Congenital Glaucoma (StatPearls Publishing (NCBI Bookshelf), 2024); Congenital Nasolacrimal Duct Obstruction (StatPearls Publishing (NCBI Bookshelf), 2026); Kawasaki Disease (StatPearls Publishing (NCBI Bookshelf), 2023).
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Representative model, for educational purposes only.