Paeds · ophthalmology

Paediatric eye examination and red-reflex assessment

Also known as Red-reflex test · Bruckner test · Leukocoria assessment · White pupil · Paediatric vision screening · Newborn eye examination · Photoscreening

Foundation topic on the paediatric eye examination and red-reflex assessment: how to perform and interpret the red-reflex (Bruckner) test at the bedside in a dim room at about 30 to 45 centimetres, the normal symmetric orange-red reflex and the four abnormal patterns (dull or absent from a media opacity, white or leukocoria, asymmetric from anisometropia or strabismus, and the darker normal variant of a pigmented fundus), the age-adapted vision assessment from newborn fixation through preferential-looking, LEA and HOTV symbols to Snellen acuity, the differential diagnosis of leukocoria led by retinoblastoma and congenital cataract, the joint AAP, AAO and AAPOS policy that the red reflex be checked at every well-child visit from the newborn period, the role of instrument-based photoscreening for preverbal children, and the non-negotiable rule that every abnormal red reflex needs urgent ophthalmology referral.

high12 referencesUpdated 16 July 202632 min readVerification in progress

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RACP General PaediatricsRACP DWERACP DCERCPCH Progress+MRCPCH TheoryMRCPCH ClinicalABP General PediatricsACGME PediatricsRCPSC Pediatrics

Red flags

A white, yellow-white or pink pupillary reflex (leukocoria) in an infant or child — possible retinoblastoma or congenital cataract; refer urgently for ophthalmology assessment and apply no drops or ointment firstAn absent or markedly dull red reflex in one or both eyes — a media opacity such as a dense cataract, vitreous haemorrhage or retinal detachment; refer urgentlyAn asymmetric red reflex with one side clearly darker, especially with a new squint — anisometropia or strabismus, both amblyopia risk factors needing ophthalmology referralA parent's report of a white pupil in a flash photograph, even if the bedside reflex looks subtle — repeat the test carefully in a dim room and refer if there is any doubtA dense white reflex in a newborn or young infant — congenital cataract or persistent fetal vasculature; early surgery is time-critical because the amblyopia sensitive period closes in the first months of life

Life stages

neonateinfanttoddlerpreschoolschool-ageadolescent

Care settings

preventive-medical-homecommunity-schooloutpatientwarddelivery-roomnicurural-remotetelehealth

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Board mappings

General Paediatrics: perform and interpret the red-reflex test at newborn and well-child visits, the age-adapted vision assessment, and the immediate triage and referral of an abnormal red reflexNeonatology: the newborn eye examination including the red reflex as part of the routine newborn checkOphthalmology interface and systems: the differential and urgent referral of an abnormal red reflex, instrument-based vision screening, and equitable access for rural, remote and Indigenous childrenPopulation child health: vision-screening policy across the ANZ, UK, US and Canadian jurisdictions and the evidence that early screening reduces amblyopiaGeneral Paediatrics written: technique and interpretation of the red-reflex test, the differential diagnosis of leukocoria, and the AAPOS and AAO vision-screening age thresholdsShort case: examine and interpret the red reflex and ocular motility in a child with an abnormal photograph or a suspected squintStructured discussion and communication: explain an abnormal red-reflex finding and its urgency to a family without alarming labels, and arrange urgent ophthalmology referralLevel 1 to 3 clinical skills: neonatal and infant examination including the red reflex, and age-appropriate vision assessmentHealth promotion and safeguarding: routine vision screening, recognition of the child needing urgent referral, and the non-accidental-injury context of a media opacityFoundation of Practice and Applied Knowledge in Practice: the red-reflex test, the differential of leukocoria, amblyopia risk factors, and vision-screening age thresholdsTAS and AKP: instrument-based photoscreening and the AAPOS referral criteria for amblyopia risk factorsShort clinical and development: examine the red reflex and vision in a child and recognise leukocoria and an asymmetric reflexCommunication: explain an abnormal red-reflex result and its urgency to a family and arrange appropriate referralGeneral Pediatrics content outline: newborn eye examination and red reflex, age-appropriate vision screening, recognition and referral of leukocoriaOphthalmology and preventive pediatrics: amblyopia risk factors, photoscreening, and the AAP, AAO and AAPOS joint vision-screening guidancePatient Care: perform and interpret the paediatric red-reflex test and age-adapted vision assessment, and triage an abnormal reflexMedical Knowledge: the physiology of the red reflex, the differential of leukocoria, and amblyopia and its sensitive periodSystems-Based Practice: equitable access to vision screening and timely ophthalmology referral for rural, remote and underserved childrenMedical Expert: the paediatric red-reflex test, age-adapted vision assessment, and the differential and triage of leukocoriaCommunicator and Health Advocate: explaining an abnormal screening finding and ensuring timely referral and follow-up

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RACP General PaediatricsRACP DWERACP DCERCPCH Progress+MRCPCH TheoryMRCPCH ClinicalABP General PediatricsACGME PediatricsRCPSC Pediatrics

Red flags

Life stages

neonateinfanttoddlerpreschoolschool-ageadolescent

Care settings

preventive-medical-homecommunity-schooloutpatientwarddelivery-roomnicurural-remotetelehealth

Clinical exam formats

written-only

Board mappings

The fellowship answer

The red-reflex test is the single most important eye examination you will perform on a child, because one finding — a white, dull or asymmetric reflex — is the gateway to retinoblastoma and congenital cataract. The technique is deliberately simple. Darken the room, set your direct ophthalmoscope to the largest bright spot, stand about an arm's length away (roughly 30 to 45 centimetres), and shine it at both pupils at once. You are looking for a symmetric orange-red glow of equal brightness, colour and size in the two eyes. That glow is light that has travelled through clear cornea, lens and vitreous, reflected off the blood-rich choroid at the back of the eye, and come back out. [4] [1]

Anything that blocks, scatters or replaces that light changes the reflex, and the change tells you roughly where the problem sits. A dull or absent reflex means something is blocking the light in the visual axis — mucus, a dense cataract, vitreous haemorrhage or a retinal detachment. A white reflex (leukocoria) means a pale lesion is sitting in the axis and reflecting light back white instead of letting it reach the choroid — think retinoblastoma, congenital cataract, persistent fetal vasculature, Coats disease or ocular toxocariasis. An asymmetric reflex, where one side is clearly darker, means one eye is out of focus or turned — anisometropia or strabismus, both of which are amblyopia risk factors. [3] [4]

The rule that must never bend: a white, absent or clearly asymmetric reflex is an abnormal screening result that needs urgent ophthalmology referral. You do not treat it, you do not put drops in, and you do not reassure on a normal-looking phone photograph. You refer, the same day if you suspect a serious lesion, because retinoblastoma can be fatal if it extends beyond the eye and a dense infantile cataract causes irreversible amblyopia within weeks to months. Frame it to the family as an abnormal screening finding that needs urgent review — never as a diagnosis. [6] [11]

And you repeat the test at every well-child visit from the newborn check onward, because the joint policy of the American Academy of Pediatrics, the American Academy of Ophthalmology and the American Association for Pediatric Ophthalmology and Strabismus is exactly that — the red reflex at every visit. [7] [4]

Two reflexes that change how the whole visit goes

Normal symmetric red reflex

White reflex (leukocoria)

Overview & Definition

A baby is born with eyes that are structurally almost complete but functionally unfinished, and the first years of life are when the visual system either wires itself correctly or learns to see badly. The job of the clinician at every well-child visit is to confirm that light is entering clearly, that the two eyes are seeing roughly equally, and that nothing dangerous is growing or sitting in the visual axis. The red-reflex test does all three of these things in about ten seconds, which is why it sits at the centre of the paediatric eye examination. [4] [1]

The red reflex is the orange-red glow you see in a child's pupil when you shine a direct ophthalmoscope at it from a distance in a dim room. It is not the reflection off the surface of the eye — it is light that has passed through the clear cornea, aqueous, lens and the vitreous, bounced off the retina and the blood-rich choroid behind it, and travelled back out through the same clear media. Because the light has to make that round trip, the reflex tests the clarity of the whole visual axis at once. A clear reflex says the pathway is open; a changed reflex says something along the pathway is blocking, scattering or replacing the light. [4] [3]

Performed properly, the test is done on both eyes together so the two reflexes can be compared side by side. This simultaneous comparison is the Bruckner test, and it is the part that catches asymmetry from anisometropia or strabismus — one reflex looks subtly darker than the other because that eye is out of focus or turned. The comparison is the point, which is why examining one eye at a time defeats half the test. [4] [3]

The red-reflex test is a screening test, not a diagnostic one. It tells you that the visual axis is probably clear, or that it is probably not, but it does not name the lesion. An abnormal result is therefore an indication for urgent ophthalmology referral, where a dilated fundus examination, ultrasound and, in an uncooperative child, an examination under anaesthesia will make the diagnosis. Holding that distinction — screening finding, not diagnosis — protects both the child (who gets referred) and the family (whom you do not wrongly label). [4] [6]

Paediatrics Fellowship Pro

You have read the opening of this topic. The complete unit — every section and its primary-source references — is part of the Paediatrics Fellowship fellowship atlas.

References12Show ledger

[1]Taksande A; Jameel PZ Red reflex test screening for neonates: A systematic review and meta analysis. Indian J Ophthalmol, 2021.PMID 34304165
[2]Sun M; Ma A Sensitivity and Specificity of Red Reflex Test in Newborn Eye Screening. J Pediatr, 2016.PMID 27640356
[3]Lin SY; Yen KG Abnormal Red Reflex: Etiologies in a Pediatric Ophthalmology Population. Clin Pediatr (Phila), 2020.PMID 32503396
[4]McLaughlin C; Levin AV The red reflex. Pediatr Emerg Care, 2006.PMID 16481935
[5]Sakaria RP; Davidson JM Improving Red Reflex Screening in a Level III NICU Through a Quality Improvement-based Approach. Hosp Pediatr, 2022.PMID 36321385
[6]Aerts I; Lumbroso-Le Rouic L Retinoblastoma. Orphanet J Rare Dis, 2006.PMID 16934146
[7]Oatts JT; Collins ME Instrument-Based Screening for the Detection of Amblyopia and Amblyopia Risk Factors: A Report by the American Academy of Ophthalmology. Ophthalmology, 2025.PMID 40864029
[8]Garry GA; Donahue SP Validation of Spot screening device for amblyopia risk factors. J AAPOS, 2014.PMID 25266832
[9]Eibschitz-Tsimhoni M; Friedman T Early screening for amblyogenic risk factors lowers the prevalence and severity of amblyopia. J AAPOS, 2000.PMID 10951293
[10]Silbert DI; Matta NS Clinical accuracy of the AAPOS pediatric vision screening referral criteria. J AAPOS, 2012.PMID 22824492
[11]McConaghy JR; McGuirk R Amblyopia: Detection and Treatment. Am Fam Physician, 2019.PMID 31845774
[12]Hunter SC; He J The UCI EyeMobile Preschool Vision Screening Program: Refractive Error and Amblyopia Results from the 2019-2020 School Year. Clin Ophthalmol, 2022.PMID 36573233

Paediatric eye examination and red-reflex assessment

Also known as Red-reflex test · Bruckner test · Leukocoria assessment · White pupil · Paediatric vision screening · Newborn eye examination · Photoscreening

high12 referencesUpdated 16 July 202632 min readVerification in progress

Practise this topic

Overview & Definition

Paediatrics Fellowship Pro

You have read the opening of this topic. The complete unit — every section and its primary-source references — is part of the Paediatrics Fellowship fellowship atlas.

References12Show ledger

[1]Taksande A; Jameel PZ Red reflex test screening for neonates: A systematic review and meta analysis. Indian J Ophthalmol, 2021.PMID 34304165
[2]Sun M; Ma A Sensitivity and Specificity of Red Reflex Test in Newborn Eye Screening. J Pediatr, 2016.PMID 27640356
[3]Lin SY; Yen KG Abnormal Red Reflex: Etiologies in a Pediatric Ophthalmology Population. Clin Pediatr (Phila), 2020.PMID 32503396
[4]McLaughlin C; Levin AV The red reflex. Pediatr Emerg Care, 2006.PMID 16481935
[5]Sakaria RP; Davidson JM Improving Red Reflex Screening in a Level III NICU Through a Quality Improvement-based Approach. Hosp Pediatr, 2022.PMID 36321385
[6]Aerts I; Lumbroso-Le Rouic L Retinoblastoma. Orphanet J Rare Dis, 2006.PMID 16934146
[7]Oatts JT; Collins ME Instrument-Based Screening for the Detection of Amblyopia and Amblyopia Risk Factors: A Report by the American Academy of Ophthalmology. Ophthalmology, 2025.PMID 40864029
[8]Garry GA; Donahue SP Validation of Spot screening device for amblyopia risk factors. J AAPOS, 2014.PMID 25266832
[9]Eibschitz-Tsimhoni M; Friedman T Early screening for amblyogenic risk factors lowers the prevalence and severity of amblyopia. J AAPOS, 2000.PMID 10951293
[10]Silbert DI; Matta NS Clinical accuracy of the AAPOS pediatric vision screening referral criteria. J AAPOS, 2012.PMID 22824492
[11]McConaghy JR; McGuirk R Amblyopia: Detection and Treatment. Am Fam Physician, 2019.PMID 31845774
[12]Hunter SC; He J The UCI EyeMobile Preschool Vision Screening Program: Refractive Error and Amblyopia Results from the 2019-2020 School Year. Clin Ophthalmol, 2022.PMID 36573233