# ICD-11 Classification for Visual Impairment (9D90)

Canonical: https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-visual-impairment
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

In ICD-11-MMS, Visual Impairment is classified at 9D90 within the visual system chapter. It is a functioning-based category grading reduced acuity and visual field loss — mild, moderate, severe and blindness — applied to the better eye with best correction, and paired separately with the underlying aetiological diagnosis.

*When a child's vision limits how they explore, learn and connect, precise classification is the first step to coordinated support.*

## In short
In **ICD-11-MMS**, Visual Impairment is coded at **9D90**, sitting within the chapter on diseases of the visual system. It is a functioning-based classification that grades reduced visual acuity and visual field loss — ranging from mild and moderate impairment through severe impairment to blindness — applied to the better eye with best available correction. The category captures the *functional* consequence of an underlying ocular or neurological cause, which is coded separately, rather than the disease mechanism itself.

## The classification, briefly
ICD-11 defines visual impairment by presenting or best-corrected distance and near visual acuity and by visual field extent, broadly aligning with WHO severity bands:

- **Mild** — visual acuity worse than 6/12
- **Moderate** — worse than 6/18
- **Severe** — worse than 6/60
- **Blindness** — worse than 3/60, or a visual field constricted to within 10 degrees

Because ICD-11 is built on the WHO framework of functioning, **9D90** describes the impact on the child's everyday function and is intended to be paired with the aetiological diagnosis (for example, cortical/cerebral visual impairment, refractive error, retinal or optic-nerve pathology) and, where relevant, ICF descriptors. For the developing child, early visual impairment is developmentally significant: it shapes motor, language, social and cognitive trajectories, so functional classification should drive a habilitation plan, not sit in isolation.

## When to refer
Any suspected reduced fixation, abnormal eye movements, photophobia, or failure to make and hold eye contact warrants prompt paediatric ophthalmology and developmental review. Early, accurate classification enables vision stimulation, environmental adaptation and multidisciplinary developmental support to begin without delay.

## The Pinnacle way
AbilityScore® is part of Pinnacle’s developmental assessment. Diagnosis, where needed, requires an appropriately qualified healthcare professional — never from a code or an online form. We translate a functional classification like 9D90 into a working developmental profile, then a plan the family can follow. Explore [how we work](/), our [occupational therapy](https://www.pinnacleblooms.org/best-occupational-therapy-center-india-proven-improvement-rate) for vision-affected development, and [what the AbilityScore is and how it is calculated](/ask/what-is-the-abilityscore-and-how-is-it-calculated).

## Trusted sources
WHO ICD-11 for Mortality and Morbidity Statistics (visual system chapter); WHO guidance on vision and severity bands; WHO ICF framework of functioning.

**Next step —** Refer a child with suspected visual impairment for a coordinated developmental review — [partner with a Pinnacle centre](/).

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.

## Sources
- WHO ICD-11 for Mortality and Morbidity Statistics: https://icd.who.int/
- WHO guidance on vision and visual impairment: https://www.who.int/

## Connected topics and perspectives
- Conditions: https://pinnacleblooms.org/ask/conditions
- Doctor: https://pinnacleblooms.org/ask/lens/stakeholder/doctor
- Sensory: https://pinnacleblooms.org/ask/lens/domain/sensory
- Definition: https://pinnacleblooms.org/ask/lens/intent/definition
- Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen
- Screen: https://pinnacleblooms.org/ask/lens/route/screen
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

### Understand the subject
- What is Visual Impairment and its ICD-11 early-childhood features?: https://pinnacleblooms.org/ask/what-is-visual-impairment-and-what-are-its-icd-11-features-in-early-childhood
- What is Visual Impairment?: https://pinnacleblooms.org/ask/what-is-visual-impairment
- SNOMED CT concept for Visual Impairment: https://pinnacleblooms.org/ask/what-is-the-snomed-ct-concept-for-visual-impairment
- ICF Domains Affected by Visual Impairment in Early Childhood: https://pinnacleblooms.org/ask/which-icf-functioning-domains-does-visual-impairment-affect-in-early-childhood
- Early Intervention Outcomes for Visual Impairment in Children Under 7: https://pinnacleblooms.org/ask/what-does-current-research-show-about-early-intervention-outcomes-for-visual-impairment-in-children-under-7
- How Visual Impairment Affects a Child's Daily Life: https://pinnacleblooms.org/ask/how-does-visual-impairment-affect-a-child-s-daily-life
- Is Visual Impairment Considered a Disability?: https://pinnacleblooms.org/ask/is-visual-impairment-considered-a-disability
- Is Visual Impairment Genetic or Hereditary?: https://pinnacleblooms.org/ask/is-visual-impairment-genetic-or-hereditary
- What are common myths about Visual Impairment?: https://pinnacleblooms.org/ask/what-are-common-myths-about-visual-impairment
- What are the types or levels of Visual Impairment?: https://pinnacleblooms.org/ask/what-are-the-types-or-levels-of-visual-impairment
- What causes visual impairment in children?: https://pinnacleblooms.org/ask/what-causes-visual-impairment-in-children
- What is Visual Impairment, and what does it look like in early childhood?: https://pinnacleblooms.org/ask/what-is-visual-impairment-and-what-does-it-look-like-in-early-childhood

### Recognise signs & concerns
- Visual Impairment Red Flags in Young Children: https://pinnacleblooms.org/ask/what-clinical-red-flags-for-visual-impairment-warrant-referral-in-a-young-child
- What early indicators of Visual Impairment should a paediatrician watch for?: https://pinnacleblooms.org/ask/what-early-indicators-of-visual-impairment-should-a-paediatrician-watch-for
- When to Refer a Child with Suspected Visual Impairment for Developmental Therapy: https://pinnacleblooms.org/ask/when-should-a-doctor-refer-a-child-with-suspected-visual-impairment-for-developmental-therapy
- Can Visual Impairment Be Cured?: https://pinnacleblooms.org/ask/can-visual-impairment-be-cured
- Can Visual Impairment Be Prevented?: https://pinnacleblooms.org/ask/can-visual-impairment-be-prevented
- Do boys show visual impairment differently?: https://pinnacleblooms.org/ask/do-boys-show-visual-impairment-differently
- Do girls show visual impairment differently?: https://pinnacleblooms.org/ask/do-girls-show-visual-impairment-differently
- How a Frontline Health Worker Can Spot Possible Visual Impairment Early: https://pinnacleblooms.org/ask/how-can-a-frontline-health-worker-spot-a-child-with-possible-visual-impairment-early
- Should I be worried my child might have Visual Impairment?: https://pinnacleblooms.org/ask/should-i-be-worried-my-child-might-have-visual-impairment
- What are the early signs of Visual Impairment?: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-visual-impairment
- Early Signs of Visual Impairment in a 1-Year-Old Boy: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-visual-impairment-in-a-1-year-old-boy
- Early Signs of Visual Impairment in a 1-Year-Old Girl: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-visual-impairment-in-a-1-year-old-girl

### Explore causes & influences
- Contributing Factors for Visual Impairment in Early Childhood: https://pinnacleblooms.org/ask/what-are-the-known-contributing-factors-for-visual-impairment-in-early-childhood
- Are boys more likely to have visual impairment?: https://pinnacleblooms.org/ask/are-boys-more-likely-to-have-visual-impairment
- Are girls more likely to have visual impairment?: https://pinnacleblooms.org/ask/are-girls-more-likely-to-have-visual-impairment
- Early Intervention for Visual Impairment & UN Child Rights: https://pinnacleblooms.org/ask/how-does-early-intervention-for-visual-impairment-advance-un-child-rights-uncrpd-and-the-sdgs
- What causes visual impairment in young children?: https://pinnacleblooms.org/ask/what-causes-visual-impairment-in-young-children
- Cost-Effectiveness of Early Therapy for Visual Impairment in Young Children: https://pinnacleblooms.org/ask/what-is-the-cost-effectiveness-of-early-therapy-for-visual-impairment-in-young-children
- Visual Impairment in young children: India's prevalence and public-health burden: https://pinnacleblooms.org/ask/what-is-the-prevalence-and-public-health-burden-of-visual-impairment-among-young-children-in-india

### Understand assessment
- Screening and diagnostic pathway for Visual Impairment under 7: https://pinnacleblooms.org/ask/what-is-the-recommended-screening-and-diagnostic-pathway-for-visual-impairment-in-children-under-7
- How AbilityScore tracks progress in Visual Impairment: https://pinnacleblooms.org/ask/how-does-abilityscore-track-progress-in-a-child-with-visual-impairment
- How Visual Impairment Is Assessed in a Young Child: https://pinnacleblooms.org/ask/how-is-visual-impairment-assessed-in-a-young-child
- How Visual Impairment Is Assessed in Children Under 7: https://pinnacleblooms.org/ask/how-is-visual-impairment-assessed-in-children-under-7
- AbilityScore 0–100 for a child with visual impairment: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-0-100-mean-for-a-child-with-visual-impairment
- AbilityScore 100–200 in Visual Impairment: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-100-200-mean-for-a-child-with-visual-impairment
- AbilityScore 200–300 and visual impairment, explained for parents: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-200-300-mean-for-a-child-with-visual-impairment
- AbilityScore 300–400 in Visual Impairment: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-300-400-mean-for-a-child-with-visual-impairment
- AbilityScore® 400–500 with Visual Impairment: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-400-500-mean-for-a-child-with-visual-impairment
- What does an AbilityScore of 500–600 mean for a child with Visual Impairment?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-500-600-mean-for-a-child-with-visual-impairment
- What an AbilityScore of 600–700 Means for Visual Impairment: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-600-700-mean-for-a-child-with-visual-impairment
- What does an AbilityScore of 700–800 mean for a child with Visual Impairment?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-700-800-mean-for-a-child-with-visual-impairment

### Explore therapy & support
- ICHI Interventions for Visual Impairment in Young Children: https://pinnacleblooms.org/ask/which-ichi-health-interventions-apply-to-visual-impairment-in-young-children
- How Caregivers Can Support a Child with Visual Impairment: https://pinnacleblooms.org/ask/as-a-grandparent-or-caregiver-how-can-i-support-a-child-with-visual-impairment-day-to-day
- Can a child with visual impairment attend a mainstream school?: https://pinnacleblooms.org/ask/can-a-child-with-visual-impairment-attend-a-mainstream-school
- Can a child with visual impairment attend a regular school?: https://pinnacleblooms.org/ask/can-a-child-with-visual-impairment-attend-a-regular-school
- Can a child with visual impairment live independently?: https://pinnacleblooms.org/ask/can-a-child-with-visual-impairment-grow-up-to-live-independently
- How a Teacher Can Help a Child with Visual Impairment Learn: https://pinnacleblooms.org/ask/how-can-a-classroom-teacher-help-a-child-with-visual-impairment-take-part-and-learn
- Identifying and supporting under-7s with visual impairment in a district programme: https://pinnacleblooms.org/ask/how-can-a-district-early-intervention-programme-identify-and-support-children-under-7-with-visual-impairment
- How a teacher can include a child with Visual Impairment: https://pinnacleblooms.org/ask/how-can-a-teacher-include-and-support-a-young-child-with-visual-impairment-in-a-mainstream-classroom
- How to Support Sensory Development in a Child with Visual Impairment: https://pinnacleblooms.org/ask/how-can-we-support-sensory-development-in-a-child-with-visual-impairment
- How therapy helps a child with visual impairment progress: https://pinnacleblooms.org/ask/how-does-therapy-help-a-child-with-visual-impairment-make-progress
- How Visual Impairment Is Diagnosed in a Child: https://pinnacleblooms.org/ask/how-is-visual-impairment-diagnosed-in-a-child
- How is Visual Impairment supported through therapy?: https://pinnacleblooms.org/ask/how-is-visual-impairment-supported-through-therapy

### At home & in everyday life
- How can I support my child with Visual Impairment at home?: https://pinnacleblooms.org/ask/how-can-i-support-my-child-with-visual-impairment-at-home