Pediatric eye diagnostics

When a Child Needs an Eye Examination

Pediatric vision assessment is important not only when a child has complaints. It helps identify refractive errors, anisometropia, amblyopia, strabismus and signs of other eye conditions while the visual system is still developing.

• The child squints and has difficulty seeing the classroom board. Visual acuity and refraction are assessed, with cycloplegia performed when indicated. Based on the findings, optical correction is prescribed, the risk or progression of myopia is evaluated, and a follow-up schedule is established.
• One eye turns or deviates from its normal position. The ophthalmologist assesses refraction in both eyes, the angle of strabismus and binocular functions. The appropriate diagnostic and treatment pathway for strabismus is determined, and amblyopia is assessed.
• The child did not pass a school vision screening. A comprehensive ophthalmological examination is performed to confirm or rule out a vision disorder.
• Glasses no longer provide the same visual clarity. Refraction and eye health are reassessed. Optical correction may be adjusted, or additional diagnostic tests may be recommended.
• The child has no symptoms but has a family history of eye disease. An age-appropriate examination and additional tests, when indicated, are performed. The ophthalmologist establishes an individualized follow-up schedule.

How the Scope of a Pediatric Eye Examination Is Determined

The same diagnostic tests are not necessary for every child. The ophthalmologist considers the child's age, ability to cooperate and perform tests, symptoms, previous examination results, glasses use and family medical history.

In young children, refraction may be assessed using retinoscopy, while school-aged children may also undergo autorefraction and subjective refraction assessment. If latent hyperopia, accommodative spasm or inaccurate measurements are suspected, the ophthalmologist may recommend cycloplegia.

Children have strong accommodative ability, which can affect the accuracy of standard refraction measurements. Cycloplegia temporarily relaxes accommodation using special eye drops and, in certain clinical situations, allows more accurate assessment of hyperopia, myopia, astigmatism and refractive differences between the eyes.

Eye Examinations for Infants and Preschool Children

A child's vision cannot be assessed solely by their ability to read letters on an eye chart. Objective and age-appropriate methods are used for infants and preschool children, so an inability to read an eye chart does not prevent examination.

The ophthalmologist evaluates visual fixation and tracking, eye alignment, pupillary responses and the red reflex. Refraction is assessed using retinoscopy or instrument-based methods.

If strabismus or amblyopia is suspected, the examination includes not only the visual function of each eye separately but also how the two eyes work together.

Why Comparing Examination Results Over Time Matters

Accurate refraction assessment and monitoring changes over time are particularly important during childhood. Uncorrected differences in refraction between the two eyes may contribute to the development of amblyopia.

For children with myopia, previous glasses prescriptions and ophthalmology reports help assess the rate of progression. Current diopter measurements alone are insufficient to determine how myopia is changing. The ophthalmologist may recommend additional measurements and follow-up visits.

How Vision Screening Differs from Comprehensive Diagnosis

Vision screening and comprehensive ophthalmological assessment serve different purposes. Screening quickly identifies children at increased risk of vision problems. A comprehensive medical eye examination is required when a child does not pass screening, has symptoms or presents with risk factors.

The pediatric ophthalmologist determines the scope of the examination. Basic tests may be supplemented by cycloplegia, binocular vision assessment, fundus examination, ocular biometry, optical coherence tomography (OCT), ultrasound or other investigations only when clinically indicated.