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Readability of computer display print enlarged for low vision.
I L Bailey1, L H Boyd, W L Boyd
1School of Optometry, University of California, Berkeley.
American Journal of Optometry and Physiological Optics
|September 1, 1987
Summary
Smooth font versions improved reading speed and accuracy for low vision readers at close distances. Letter smoothing enhanced performance for all participants at far distances, benefiting low vision accuracy.
Area of Science:
- Vision Science
- Human-Computer Interaction
- Graphic Design
Background:
- Legibility of on-screen text is crucial for reading performance.
- Font rendering (e.g., smoothing) can impact visual perception.
- Understanding how font variations affect individuals with low vision is important.
Purpose of the Study:
- To investigate the impact of font smoothing on reading speed and accuracy.
- To compare performance between low vision and normally sighted individuals.
- To examine the influence of viewing distance on font smoothing effects.
Main Methods:
- Participants performed a letter counting task using grainy and smooth Times Roman fonts.
- Two viewing distances were used: close (practical) and far (near threshold).
- Speed and accuracy were measured for both low vision and normally sighted groups.
Main Results:
- Smooth fonts improved performance at close distances for all participants.
- Letter smoothing enhanced accuracy at far distances for all groups.
- Low vision participants showed improved accuracy with smooth fonts at close distances, unlike normally sighted individuals.
Conclusions:
- Font smoothing offers benefits for reading performance, particularly for low vision individuals at practical viewing distances.
- Viewing distance significantly interacts with the effects of font smoothing on reading.
- Optimizing on-screen font rendering can enhance accessibility for visually impaired users.