WGOS 3 certificates of vision impairment (CVI) issued to Welsh residents by ethnic group

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Next update expected:October 2027

Updates

8th October 2026

New data added for 2025-26 (provisional). And data for 2024-25 has been updated to include Welsh residents certified in England.

30th September 2025
Dataset first published.

Main information

Designation
Official statistics
Data provider 1
NHS Wales Shared Services Partnership
Data source 1
Certificate of Vision Impairment (CVI) form
Data provider 2
Moorfields Eye Hospital
Data source 2
No specific source from data provider
Time period covered
April 2012 to March 2026
Dataset ID
3db6d854-67ca-4de3-a6e0-d441013c0575

Overview

Summary of dataset and variables

This dataset shows the number of Welsh residents newly certified as severely sight impaired or sight impaired with a certificate of vision impairment (CVI) by broad ethnic group.

WGOS 3 enables patients who would benefit from optical and non-optical aids as well as holistic rehabilitation support (including sight impairment registration) and advice to access a low vision service in or close to their place of residence. WGOS 3 also includes Certification of Vision Impairment (CVI).

Data collection or calculation

For 2023-24 onwards, data is extracted from the low vision system maintained by NHS Wales Shared Services Partnership (NWSSP) and is based on data collected from a CVI form by NWSSP. The data covering periods up to 2022-23 was supplied by Moorfields Eye Hospital and was extracted from the Database for Epidemiological data on Visual Impairment Certificates (DEVICE).

The counts are based on Welsh residents newly certified on Welsh and English forms. After NWSSP took over the data collection from 2023-24, data for Welsh residents certified in England is provided separately by Moorfields Eye Hospital.

To produce the final dataset the number of new certifications are aggregated by broad ethnic group and financial year at Wales level.

Statistical quality

The ethnicity of patients issued with a CVI is unknown for a sizeable proportion of certificates each year.

Counts fewer than five are suppressed, and secondary suppression is applied where necessary to prevent disclosure through deduction.

Data for the latest year excludes Welsh residents certified in England. This is because this data is supplied by Moorfields Eye Hospital later in the year and therefore, the data for the latest year will be updated to include Welsh residents certified in England in the next publication.

Related reports

Published by

Organisation
Welsh Government
Contact email
stats.healthinfo@gov.wales