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VDTs and vision
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Vision checklist
Refractive errors
- Hyperopia
- Myopia
- Astigmatism
- Phoria
- Prosbyopia
Work practices
- Constant versus intermittent
- Prolonged versus rare
- Frequency of blinking
- Frequency of looking away from work
Workstation dimensions
- Distance from eye to top of screen
- Relationship of ancillary equipment or documents to screen
- Distance from eye to ancillary equipment or documents
- Angle subtended by horizontal and line of sight
Source and position of lighting and other sources of glare
- Overhead
- Task
- Outside
Presence and type of glare filters
Humidity, dust
Screen qualities and flicker---persistence and refresh rate
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