WGOS 3 certificates of vision impairment (CVI) issued by service location and patient residence

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Next update expected:October 2027

Updates

8th October 2026

New data added for 2025-26 (data for Welsh residents certified in England will be available in the next publication). 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
NHS Wales Shared Services Partnership
Data source
Database for Epidemiological data on Visual Impairment Certificates (DEVICE)
Time period covered
April 2023 to March 2026
Dataset ID
d8841a73-73c4-40df-989f-e85060dc95e9

Overview

Summary of dataset and variables

This dataset shows the number of certifications of vision impairment (CVI) by patient residence and service location health board in Wales, alongside a total for England. It highlights cross-border flows where patients live in one area but are certified in another. The data is broken down by patient health board and service health board for Wales, with England included as a single total.

The dataset provides insight into patterns of patient movement for certification services across Welsh health boards and between Wales and England over time.

Data collection or calculation

The data for all certification services provided in Wales are provided by NHS Shared Service Partnership (NWSSP), whereas for Welsh residents certified in England the data is provided by Moorfields Hospital.

Certifications of vision impairment are grouped by financial year, service location health board, and patient residence health board. Patient and service health boards in Wales are identified using standard codes, with England represented as a single category. Counts are calculated for each combination.

Statistical quality

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