In young children, unrecognised myopia or other vision problems can sometimes look like ADHD: poor attention, avoiding reading, classroom distraction, or seeming “not to listen.” Before assuming behavioural causes, a comprehensive eye examination can help identify whether vision is contributing to learning and attention difficulties.

A child who cannot see cannot pay attention. He cannot sit still. He cannot follow a lesson, read a board, or make sense of a world that is blurred beyond recognition. High uncorrected refractive errors in young children — especially combined myopia and astigmatism — produce every clinical sign that gets labelled as behavioural, neurological, or cognitive. The child is not the problem. The prescription is missing.

Before a four-year-old is labelled ADHD or assessed for intellectual compromise, someone must examine their eyes properly. A cycloplegic refraction and a dilated fundus examination take twenty minutes. The diagnosis they prevent may define many years of that child’s life.

Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator with over 25 years of experience. Her approach focuses on identifying risk before damage is irreversible, simplifying treatment decisions, and protecting vision long-term. Emphasis on early detection, risk assessment, and continuity of care. She is rated 5 stars across 1,500+ patient reviews on Google.

He Was Told He Was a Slow Learner. He Topped His School.

A radiologist colleague brought her four-year-old son to me. She worked in the same hospital. She understood anatomy, imaging, contrast, shadow — but she did not know what to do with what the doctors were telling her about her child.

He had been born preterm. A forceps delivery. The medical team had concerns about optic nerve damage from the birth. They told her he had ADHD. And that he was a slow learner.

She sat across from me carrying all of that. And her son bounced around the room.

I looked at him. I looked at his eyes.

What the examination found

He had myopia of −2.00 dioptres and astigmatism of −4.50 dioptres cylinder, in both eyes, from birth.

His optic nerves were healthy. Completely healthy. The damage everyone feared was not there.

This child had never been able to see properly. Every blackboard, every face, every alphabet chart — a blur. He was not hyperactive because of a neurological problem. He was hyperactive because he was navigating a world that made no visual sense. Of course he could not sit still. He could not see what he was supposed to be attending to.

What two years of proper correction did

He got the right glasses. The world came into focus. The restlessness settled. The alphabet, once an impossible blur, became something he could learn.

He had some meridional amblyopia from the uncorrected high astigmatism — his visual system had not developed fully along the axis of blur. We treated it. It resolved. By five and a half, he was reading 6/6. By six, he had caught up entirely.

The refraction has been stable since childhood. The optic nerves remain healthy.

Ten years later

He walked into my clinic yesterday. All of fourteen, full of himself and life, with all the answers in the world — as he should be. Taller than me. And his mom.

He had topped his school. He had topped his class. Just to ask me whether he could wear contact lenses, because his mother had said no. His mother was worried about keratoconus risk given the early high astigmatism.

I looked at his corneal topography. His cornea is perfectly normal. His astigmatism is stable and has been stable since he was a baby. I told him he could wear contact lenses, provided he was careful about hygiene. I told his mother what the topography showed, so her mind was fully at rest.

From labelled as cognitively compromised at four years old — to school topper at fourteen.

That is what a missed refractive error costs. And that is what finding it in time returns.

FAQs

Can a refractive error cause a child to be misdiagnosed with ADHD?

Yes — and this happens more often than it should. A child with high uncorrected myopia or astigmatism cannot see clearly at any working distance. She cannot follow what is written on a board, cannot sustain attention on a page, and cannot sit still in a classroom environment that makes no visual sense to her. These behaviours are clinically indistinguishable from ADHD without a proper eye examination. Any child being assessed for ADHD, learning difficulty, or developmental delay should have a full eye examination — including cycloplegic refraction — before any other diagnosis is made.

What is cycloplegic refraction and why does it matter for children?

Cycloplegic refraction uses eye drops to temporarily relax the ciliary muscle — the muscle children use to auto-focus. Without cycloplegia, children unconsciously compensate for refractive errors during the examination, and the true prescription is masked. A child’s power measured without cycloplegia can be significantly undercorrected. This is not optional in young children: it is the only way to measure the actual refractive error and make a correct prescription.

What is meridional amblyopia?

Meridional amblyopia occurs when high astigmatism goes uncorrected during the sensitive period of visual development. The visual cortex does not receive clear input along the axis of blur, and neural connections for that orientation fail to develop fully. The result is reduced visual acuity that cannot be corrected by glasses alone — the brain itself has not learned to process that axis clearly. With early correction and sometimes occlusion therapy, it is largely reversible. This is why detecting and correcting high astigmatism before age six matters so much.

Is high astigmatism in a baby a sign of keratoconus?

Not by itself. High astigmatism in infancy is common and usually represents a normal refractive error, not a corneal disease. Keratoconus is a progressive thinning of the corneal tissue and almost never presents clinically in early childhood. The important thing is to monitor stability over time. If astigmatism remains stable through childhood and adolescence — as it did in this child — the risk of keratoconus is very low. Corneal topography in adolescence gives a clear and definitive answer and reassures both the patient and the parents.

At what age should a child have their first eye examination?

The first comprehensive eye examination should happen at six months, again at three years, and before starting school. This is not the same as a vision screening at a paediatrician’s visit — those catch only gross deficits. A proper examination by an eye specialist includes assessment of refractive error, binocular alignment, and the health of the optic nerve and retina. Children with a family history of high refractive error, squint, or lazy eye should be examined earlier and followed more closely.

Can a child with high myopia and astigmatism safely wear contact lenses?

Yes, in most cases, once the prescription is stable and the child is old enough to manage lens hygiene responsibly — typically from the early teenage years. The key safety step before prescribing contact lenses in a patient with high astigmatism is corneal topography, which maps the shape of the cornea and rules out any early signs of keratoconus. If the topography is normal and the refraction is stable, contact lenses are safe, well-tolerated, and often preferable to spectacles for active teenagers.

This article is a part of the Paediatric Ophthalmology Hub. Please also read Children’s Eye Care, Nutrition, Are Children’s Eyes More Vulnerable, Lazy Eye, and Myopia Prevention in Children. Eye Care Tips for Screen Use, and 7 Ways to Take Care of Your Child’s Eye Health also may be of interest.

You may want to see some eye care tips for children here, here, and here.

About the Author

This article was written by Dr Shibal Bhartiya, fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator, Clinical Director at Marengo Asia Hospitals, Gurugram, known for ethical, patient-centred eye care and independent second opinions. She is also Program Director for Community Outreach & Wellness and for the Marengo Asia International Institute of Neuro and Spine.

She has published peer-reviewed research on glaucoma management and paediatric eye health, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.

As Editor-in-Chief of Clinical and Experimental Vision and Eye Research and Executive Editor of the Journal of Current Glaucoma Practice (PubMed Indexed, official journal of the International Society of Glaucoma Surgery), Dr Shibal Bhartiya brings editorial and research depth to every clinical decision. Her 200+ publications, including 90+ PubMed-indexed publications and 28 edited textbooks, span glaucoma biology, surgical outcomes, paediatric eye health, and emerging diagnostics.

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