Key Terms
Concise definitions for terms used throughout this guide
The following definitions are provided for quick reference. Full context for each appears in the relevant section of the guide.
Ciliary Muscles
The small muscles inside the eye that adjust lens shape for near or distant focus. Held in sustained contraction during prolonged near work, contributing to digital eye strain.
Cue-Utilisation Hypothesis
A classic, well-replicated psychological finding that rising emotional arousal narrows the range of environmental information a person attends to, focusing on central cues at the expense of peripheral ones.
Digital Eye Strain
A common cluster of symptoms — including dryness, fatigue, and accommodative discomfort — associated with prolonged screen use, affecting an estimated 50% or more of regular computer users.
Macula
The central part of the retina responsible for detailed, high-acuity vision. Age-related macular degeneration affects this region specifically.
Myopia
Short-sightedness — difficulty seeing distant objects clearly. Rising in global prevalence, with outdoor time identified as the strongest evidenced protective factor, particularly in children.