Visual function assessment in medical imaging research

Lanca, C, Thompson, JD ORCID:, Lanca, L and Hogg, P ORCID: 2015, 'Visual function assessment in medical imaging research' , Radiologic Technology, 87 (2) , pp. 129-138.

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Access Information: Include the following statement on any copies made or distributed: ©2015, the American Society of Radiologic Technologists. All rights reserved. Reprinted with permission of the ASRT for educational purposes.


Background: Medical image perception research relies on visual data to study the diagnostic relationship between observers and medical images. A consistent method to assess visual function for participants in medical imaging research has not been developed and represents a significant gap in existing research. Methods: Three visual assessment factors appropriate to observer studies were identified: visual acuity, contrast sensitivity, and stereopsis. A test was designed for each, and 30 radiography observers (mean age 31.6 years) participated in each test. Results: Mean binocular visual acuity for distance was 20/14 for all observers. The difference between observers who did and did not use corrective lenses was not statistically significant (P ! .12). All subjects had a normal value for near visual acuity and stereoacuity. Contrast sensitivity was better than population norms. Conclusion: All observers had normal visual function and could participate in medical imaging visual analysis studies. Protocols of evaluation and populations norms are provided. Further studies are necessary to understand fully the relationship between visual performance on tests and diagnostic accuracy in practice.

Item Type: Article
Schools: Schools > School of Health and Society > Centre for Health Sciences Research
Journal or Publication Title: Radiologic Technology
Publisher: American Society of Radiologic Technologists
ISSN: 0033-8397
Related URLs:
Funders: Non funded research
Depositing User: P Hogg
Date Deposited: 09 Nov 2015 11:01
Last Modified: 15 Feb 2022 19:52

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