Paeds · ophthalmology
Cortical visual impairment
Also known as Cortical visual impairment · Cerebral visual impairment · CVI · Cortical blindness · Neurological visual impairment · Perceptual visual dysfunction · Delayed visual maturation
Fellowship topic on cortical visual impairment (CVI) in children — the leading cause of childhood visual impairment in high-income countries — covering the definition of decreased visual responsiveness from damage to the retrogeniculate visual pathways and occipital cortex with a structurally normal eye; the shift from cortical to cerebral visual impairment terminology; the causes dominated by hypoxic-ischaemic encephalopathy and periventricular leukomalacia alongside stroke, infection, trauma and structural-metabolic disease; the paradoxical clinical characteristics of fluctuating vision, light-gazing, distance-better-than-near vision, crowding difficulty and lower-field deficits; the clinical diagnosis built on a neurological history, a normal eye exam and neuroimaging with structured tools such as the CVI Range; and the habilitative management of environmental modification, individualised visual stimulation and multidisciplinary support across home and school.
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Target exams
Red flags
- A child with profoundly reduced vision whose external and fundoscopic eye examination is normal — cortical or cerebral visual impairment, not ocular blindness; the eye is structurally intact and the damage is in the brain
- An infant who fixes and follows intermittently, looks toward lights or distant objects but ignores near faces, and fatigues visually — the paradoxical visual behaviour pattern of CVI
- A preterm infant with periventricular leukomalacia or an asphyxiated term newborn who fails to develop visual attention by the corrected age of three to four months — image the visual pathways and assess cortical vision
- A child with sudden visual loss, headache or new focal neurological signs — an acute intracranial process such as hydrocephalus, stroke or raised intracranial pressure, not chronic CVI; image and refer urgently
- An apparently blind child with a normal eye exam who also has developmental regression, seizures or microcephaly — a progressive neurodegenerative or metabolic disorder masquerading as stable CVI
Life stages
Care settings
Clinical exam formats
Board mappings
- General Paediatrics and Ophthalmology: cortical visual impairment — definition, the paradoxical clinical features and the normal eye exam that points to a brain cause
- Neonatology and Neurology: HIE and periventricular leukomalacia as the dominant causes of CVI, and the need to assess cortical vision in the neurologically injured infant
- Neurodisability and Ophthalmology: the cerebral visual impairment spectrum, perceptual visual dysfunction and its overlap with cerebral palsy and neurodevelopmental disorders
- Community and Developmental Paediatrics: multidisciplinary diagnosis using structured tools such as the CVI Range and habilitative management across home and school
- General Paediatrics: recognising the child whose poor vision is out of proportion to a normal eye exam and organising assessment and imaging
- Child development and disability: environmental modification, individualised visual stimulation and the education plan for a child with CVI
- Long Case / Structured discussion: a child with cerebral palsy and cortical visual impairment — cause, assessment, the impact on learning and the multidisciplinary management plan
- Communication station: explaining to parents that their child's visual difficulty arises from the brain rather than the eye, and how to adapt the environment at home and school
- Level 2 / 3 — Ophthalmology and Neurodisability: cortical visual impairment, the causes and the paradoxical clinical features, and the multidisciplinary approach
- Child development and neurodisability: perceptual visual dysfunction and its impact on learning, behaviour and independence
- Foundation of Practice (FOP): the definition and causes of cortical visual impairment and the clinical clue of the normal eye exam
- Applied Knowledge in Practice (AKP): the paradoxical visual behaviours, the diagnostic approach with neuroimaging and structured assessment, and the habilitative management
- History-taking and management: the infant who does not fix and follow despite a normal eye exam, and the child with CVI in a neurodisability clinic
- Communication: explaining cortical visual impairment to a family and describing practical environmental adaptations
- General Pediatrics Content Outline — neurology and ophthalmology: cortical visual impairment as the leading cause of childhood visual impairment, causes, clinical features and management
- Neonatology: HIE and preterm white-matter injury as the dominant perinatal causes of CVI
- Neurodevelopmental and behavioral pediatrics: the impact of perceptual visual dysfunction on learning and the multidisciplinary habilitation plan
- Patient Care: recognition and multidisciplinary assessment of a child with cortical visual impairment, organising neuroimaging and structured visual assessment
- Systems-Based Practice: coordinating ophthalmology, neurology, education and therapy services for a child with complex visual and developmental needs
- Medical Knowledge: the post-chiasmal visual pathway, the perinatal causes of CVI and the paradoxical clinical characteristics
- Medical Expert: cortical visual impairment diagnosis, cause and the paradoxical clinical features with a structurally normal eye
- Collaborator and Health Advocate: multidisciplinary habilitation, educational support and family-centred environmental adaptation
- Communicator: explaining brain-based visual impairment and supporting the family and school to optimise the child's visual and developmental potential
Ocular versus cortical (cerebral) visual impairment
Ocular visual impairment
Cortical (cerebral) visual impairment
Overview & Definition
Picture a nine-month-old born at 26 weeks gestation who, despite clear media, normal red reflexes and a healthy retina, does not reliably reach for a toy held in front of her and turns toward the window light rather than her mother's face. The eyes look perfect, yet the child does not see in the expected way. This is the everyday face of cortical visual impairment, and the central teaching point is that a child can be visually impaired with structurally normal eyes because the damage lies in the brain. [2] [6]
Cortical visual impairment is reduced visual function caused by damage to the post-chiasmal visual pathways — the optic radiations, the occipital cortex and the higher visual association areas — in the presence of an eye that is normal or only minimally abnormal on examination. The older term cortical blindness has fallen out of favour because most affected children are not blind, their vision fluctuates and the pathology is often not confined to the cortex. Cerebral visual impairment is now the preferred umbrella term, covering both the basic visual deficits (acuity and field loss) and the higher-order perceptual problems that arise from injury anywhere along the retrogeniculate pathway. [1] [8]
The skill in CVI is threefold. First, recognise that a child whose eye exam is normal but who sees poorly has a brain problem and needs neurological assessment and imaging. Second, characterise the visual difficulty — not just acuity, but the fluctuation, crowding intolerance, field deficits and the perceptual problems that shape how the child functions at home and school. Third, build a habilitative plan that adapts the environment to the child's visual profile and supports development, because there is no medical or surgical fix for the injured visual cortex itself. [3] [11]
References12ShowHide
- [1]Phillips MJ; Chang MY Update on Cerebral/Cortical Visual Impairment (CVI) in Children. Int Ophthalmol Clin, 2026.PMID 41870238
- [2]Philip SS; Dutton GN Identifying and characterising cerebral visual impairment in children: a review. Clin Exp Optom, 2014.PMID 24766507
- [3]Boonstra FN; Bosch DGM; Geldof CJA; et al The Multidisciplinary Guidelines for Diagnosis and Referral in Cerebral Visual Impairment. Front Hum Neurosci, 2022.PMID 35845239
- [4]Khetpal V; Donahue SP Cortical visual impairment: etiology, associated findings, and prognosis in a tertiary care setting. J AAPOS, 2007.PMID 17459745
- [5]Phuljhele S; Balasubramaniam N; Saluja G; et al The pattern of visual impairment in the spectrum of hypoxic ischemic encephalopathy. Indian J Ophthalmol, 2025.PMID 40272296
- [6]Khurana R; Shyamsundar K; Taank P; et al Periventricular leukomalacia: an ophthalmic perspective. Med J Armed Forces India, 2021.PMID 33867629
- [7]Galli J; Loi E; Calza S; et al Natural history of cerebral visual impairment in children with cerebral palsy. Dev Med Child Neurol, 2025.PMID 39316724
- [8]Chokron S; Dutton GN From vision to cognition: potential contributions of cerebral visual impairment to neurodevelopmental disorders. J Neural Transm (Vienna), 2023.PMID 36547695
- [9]Lindquist B; Westerberg C Closing in on a Consensus in Identifying, Assessing and Diagnosing Children With Cerebral Visual Impairment. Acta Paediatr, 2025.PMID 40558005
- [10]Chang MY; Reid MW; Roman-Lantzy C; et al Validity and Reliability of the CVI Range for Clinical Research: Baseline and One-Year Results. Ophthalmol Sci, 2026.PMID 42317780
- [11]Pehere NK; Dutton GN Perceptual visual dysfunction in children - An Indian perspective. Indian J Ophthalmol, 2021.PMID 34304166
- [12]Lin M; Borchert MS; Chang MY Vision-Specific Quality of Life in Children With Cortical or Cerebral Visual Impairment. J Vis Impair Blind, 2025.PMID 41473410