01Purpose and principlesWhat the assessment is for and the core concepts behind it.
Direct ophthalmoscopy uses light entering the pupil to illuminate the retina while the examiner views returning light along a similar axis. The instrument gives an upright, magnified image of a small part of the fundus. It can reveal important disc, vascular and retinal abnormalities, but it is technically demanding through a small pupil and does not provide a broad stereoscopic view. The red reflex is a separate, useful part of the examination: light reflected from the fundus passes back through the optical media, so an opacity along that route may interrupt or alter the reflex before a detailed retinal view is possible.
Prepare the patient as well as the instrument. Explain that you will come close to the face and may briefly cause glare. Obtain agreement, ensure comfortable positioning and check that the ophthalmoscope works. Ask the patient to look at a distant fixed point, ideally over your shoulder, rather than following the light. Dim ambient lighting enough to improve the pupil aperture while maintaining safe movement. Establish visual acuity and pupil findings first; dilation would change the baseline pupil examination. Remove the patient's spectacles when they obstruct access, and adjust the focusing wheel for the combined refractive circumstances.
From a comfortable distance, direct the beam through each pupil and observe the reflex. Compare brightness, colour, shape and interruptions, taking account of the lighting, viewing angle and fundal pigmentation. Red, orange and lighter shades can all occur in healthy eyes; symmetry and clarity matter more than demanding one universal colour. A dark shadow, marked asymmetry or white reflex needs explanation. Try improving alignment and ask a more experienced examiner to confirm an equivocal view, but repeated unsuccessful attempts should not become an excuse to postpone an indicated referral.
For the right fundus, use your right eye and usually your right hand, approaching from slightly temporal to the patient's line of sight; reverse sides for the left. Find the reflex, maintain it as you move closer and use the lens wheel to focus. If a vessel comes into view before the disc, follow it towards its wider branching origin. Small changes in your angle often help more than large movements. Avoid touching the cornea or pressing on the eyelid. Stop if the patient cannot tolerate the examination, and be especially cautious around an injured eye.
Describe the optic disc by its colour, margin, cup and any haemorrhage, then examine the visible vessels and retinal background in a reproducible sequence. Assess the macular region last because asking the patient to look towards the beam can be uncomfortable and constrict the pupil. Record laterality and the location and appearance of abnormalities rather than immediately asserting a diagnosis. A pale disc, blurred margin, haemorrhage or asymmetric cup is a finding requiring clinical interpretation. Disc appearance alone is insufficient to diagnose glaucoma, and a cup estimate from a poor view should not be treated as a precise measurement.
Dilation may improve examination substantially, but it is an intervention with contraindications and consequences. A clinician authorised and competent to administer a mydriatic should assess the anterior chamber angle risk and relevant ocular history, record baseline pupils and explain temporary blur and light sensitivity. Follow the selected product's instructions rather than borrowing a regimen from a different preparation. A narrow filtration angle or narrow-angle glaucoma contraindicates Minims tropicamide. In a setting without the necessary examination skills, arrange appropriate assessment instead of giving drops solely to complete a checklist. Dilation must not delay transfer for a sight-threatening presentation.
In newborn and infant screening, an abnormal reflex may indicate congenital cataract or another serious ocular abnormality. The England NIPE programme specifies urgent referral after an abnormal newborn screen, with ophthalmologist review within two weeks of that examination; significant concerns should be discussed before discharge. After an abnormal six-to-eight-week infant screen, arrange prompt referral with specialist review by eleven weeks of age. These are screening standards, not permission to wait when a white pupil or concerning clinical presentation warrants faster discussion. Ask about parental observations, including repeated white reflections in photographs, and document them even if today's view appears reassuring.
The main interpretive skill is recognising the boundary of the examination. A dense cataract or vitreous opacity may prevent fundal inspection, and an undilated direct view may miss a peripheral tear or detachment. Describe this as an incomplete view rather than normal fundoscopy. If disc swelling is suspected, consider associated headache, vomiting, neurological symptoms and visual change and arrange urgent assessment; not every swollen-looking disc represents raised intracranial pressure, but distinguishing mimics can require specialist imaging. An examination result should change the plan only to the extent that its quality and field of view justify.
Key points
- Measure vision and record pupils before dilation, and ask about trauma, pain, flashes, floaters, headache and recent surgery.
- Dim the room, explain the close working distance and start by comparing the reflex from each pupil at a distance.
- Use the right eye and hand for the patient's right eye and the left side for the left, approaching through the reflex while maintaining alignment.
- Inspect disc, vessels, visible retinal quadrants and macula systematically, recording what was actually seen and any limits.
- A direct ophthalmoscope provides a magnified narrow view; a reassuring central fundus does not exclude peripheral retinal pathology.
- Pharmacological dilation needs a competent assessment of suitability, informed advice and documentation of the drug and time.
- An abnormal newborn screening reflex requires urgent referral and ophthalmologist assessment within two weeks of the newborn examination under the England NIPE pathway.
02Indications, selection and cautionsWhen it is useful, when urgency changes and important limitations.
A shadow or dull asymmetric reflex may arise from corneal, lens or vitreous opacity. Check alignment and correlate with acuity and symptoms; a poor reflex describes an optical observation without identifying the exact cause.
A white or partly obscured pupil reflection, persistent asymmetry or parental reports of repeated leukocoria requires a prompt paediatric ophthalmology pathway. Congenital cataract and retinoblastoma are among the diagnoses needing exclusion.
Blurred margins or apparent elevation alongside headache, vomiting or neurological symptoms requires urgent assessment. Document the view and symptoms without claiming to have excluded raised intracranial pressure from an uncertain image.
New flashes, floaters and a curtain may reflect a retinal tear or detachment even when the disc and macula look normal. Arrange a dilated specialist retinal examination rather than relying on the narrow direct view.
03Method and interpretationA systematic approach to the test and its findings.
Read from the initial assessment onwards. Tests may run in parallel in urgent care; first-line, preferred, confirmatory, definitive and gold-standard labels appear only when the chapter explicitly states them.
- 01
Reflex comparison before close examinationFirst step - Why
- Assess optical clarity and identify asymmetry before attempting detailed fundoscopy.
- Interpretation and limitations
- Use equivalent illumination and viewing geometry for each eye. Colour varies with pigmentation; persistent white reflection, shadows or unequal clarity needs explanation after simple alignment problems are considered.
- 02
Systematic direct fundus inspection - Why
- Inspect the disc, vessels and accessible posterior retinal structures.
- Interpretation and limitations
- Document the structures seen, significant findings and pupil or media limitations. A central normal appearance cannot exclude a lesion outside the instrument's narrow field.
- 03
Assessment before pharmacological dilation - Why
- Determine whether a mydriatic can safely improve the view.
- Interpretation and limitations
- Record pupils and consider angle depth and intraocular pressure as required by the selected product, provided examination itself is safe. Suspected open-globe injury prohibits tonometry and needs immediate specialist management.
- 04
Specialist dilated examination and imaging - Why
- Complete an inadequate examination or investigate a suspicious finding.
- Interpretation and limitations
- Slit-lamp fundus biomicroscopy, indirect ophthalmoscopy, photography or optical coherence tomography answer different questions. Choose the referral urgency from the symptoms and suspected disorder rather than the availability of a convenient imaging test.
04Clinical next stepsHow the result changes management or prompts escalation.
01Examination sequenceBuild a useful fundus descriptionFirst stepThe patient is stable and direct ophthalmoscopy is clinically appropriate.+
- 1Record acuity, relevant symptoms and undilated pupil findings, explain the examination and establish comfortable distant fixation.
- 2Compare the reflexes, follow one into the eye and inspect the disc, vessels and visible retinal areas systematically.
- 3Write specific positive and negative observations with the examination limitations, then decide whether specialist completion is required.
02Inadequate viewEscalate according to the clinical questionEscalationThe pupil, optical media or examination conditions prevent a reliable fundal assessment.+
- 1Try appropriate positioning and focus adjustments without repeated painful or forceful attempts to obtain an image.
- 2Consider safe dilation only with the necessary competence and product checks, otherwise arrange examination in a suitable eye service.
- 3Use acute symptoms to determine urgency and communicate explicitly that important retinal or disc pathology has not been excluded.
03Infant screeningAct on an abnormal reflexA newborn or infant has an abnormal or persistently uncertain screening reflex.+
- 1Check the reflex technique and seek an experienced assessment of an equivocal finding without losing the required screening timeframe.
- 2Refer an abnormal newborn screen urgently for ophthalmologist review within two weeks, discussing major concerns before discharge under the England NIPE pathway.
- 3For an abnormal infant screen arrange prompt specialist review by eleven weeks of age, document parental concerns and confirm that the referral has been received.
05Procedure and medicine safetyRelevant preparation, treatment and contraindications.
Minims tropicamide 0.5% eye drops
For an adult diagnostic episode, instil one drop into the eye being examined, then a second drop after five minutes; a further drop after thirty minutes may be used if required by the examination. Discard the single-use unit afterwards.Contraindicated with hypersensitivity, a narrow filtration angle or narrow-angle glaucoma. Assess angle depth and pressure before use when safe, take extra care in an inflamed eye and use in pregnancy only if essential. Reduce systemic absorption with lacrimal-sac compression for one minute; advise against driving while vision or glare is affected and give urgent advice for pain, redness, haloes or nausea.
06Risks, monitoring and follow-upComplications, safety checks and further assessment.
- After dilation, record the preparation, concentration, eye, administration time and any adverse response so later pupil findings can be interpreted correctly.
- Explain the significance and uncertainty of the observed abnormality, the receiving service and how quickly assessment is expected.
- Check that infant screening referrals have an accountable follow-up process; arranging a referral and confirming an appointment are distinct tasks.
- Advise urgent reassessment if visual loss, a spreading shadow, significant headache or painful redness develops after an initially limited examination.
07Special situationsVariants, exceptions and circumstances that change the usual approach.
Examination quality belongs in the result
A description such as disc seen clearly but peripheral retina not examined tells the next clinician more than a blanket normal label and prevents inappropriate reassurance.
Compare like with like
Reflex asymmetry can be exaggerated by an oblique beam, a constricted pupil or unequal room lighting. Correct these conditions before interpreting subtle differences, while taking persistent abnormalities seriously.
Screening and symptomatic pathways differ
A screening appointment deadline describes a programme standard. A symptomatic child or a major abnormality may need discussion and assessment sooner than that outer limit.
Imaging does not replace clinical localisation
A fundus photograph documents the area captured, while retinal imaging examines selected structures. Neither makes a neurological history or examination unnecessary when visual symptoms suggest disease beyond the retina.
08Common pitfallsFrequent interpretation and management errors.
- 01
Writing 'fundus normal' when only a glimpse of the disc was obtained through a small pupil.
- 02
Equating a normal-coloured reflex with a complete retinal examination or ignoring persistent photographic leukocoria reported by a parent.
- 03
Using a mydriatic before documenting pupils or without assessing contraindications and the patient's ability to travel safely afterwards.
- 04
Assuming an abnormal-looking disc can be classified confidently without considering symptoms, image quality and specialist assessment.