- Looking at digital device screens
- Reading without pausing to rest your eyes
- Driving long distances and doing other activities involving extended focus
- Being exposed to bright light or glare
- Straining to see in very dim light
- Having an underlying eye problem, such as dry eyes or uncorrected vision (refractive error)
- Being stressed or fatigued
- Exposure to dry moving air from a fan, heating or air-conditioning system
Certain types of lighting may also contribute to this condition. Studies seem to show that continued exposure to fluorescent light may be harder on the eyes than other types of lighting. Fluorescent lights have continual changes in intensity, and though these changes are nearly imperceptible, they can cause the eye to strain without the person even being aware it is occurring. In offices and work spaces that use fluorescent lighting, it is recommended that workers also be given incandescent lamps near their workstations to help reduce the stress on the eyes.
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