20-20-20 Rule
A screen-hygiene guideline suggesting that every 20 minutes, you look at something 20 feet away for 20 seconds.
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Glossary
This glossary is built for readers who want the language behind dry eyes, sleep rituals, and steam eye mask therapy without reading like a medical textbook.
A screen-hygiene guideline suggesting that every 20 minutes, you look at something 20 feet away for 20 seconds.
A type of dry eye where the eyes do not produce enough of the watery portion of tears.
Inflammation of the eyelid margins that can contribute to irritation, crusting, and unstable tears.
The body’s internal 24-hour timing system that influences alertness, temperature, and sleepiness.
The clear front surface of the eye that must stay smooth and well-lubricated for comfortable vision.
A group of symptoms caused by prolonged screen use, including tired eyes, dryness, headaches, and blurred vision.
A condition in which the eyes do not maintain a stable, comfortable tear film.
Dry eye driven by tears evaporating too quickly, often because the oil layer is weak or insufficient.
Cleaning practices used to reduce debris, oil buildup, and irritation around the eyelid margin.
The gland that produces the watery component of tears.
The outer oily layer of the tear film that slows tear evaporation.
Small glands in the eyelids that secrete oils into the tear film.
A condition where meibomian gland oils become thick, blocked, or insufficient, contributing to evaporative dry eye.
A hormone that helps regulate sleep timing and signals the body that it is time to wind down.
A form of warming therapy that combines heat with humidity or steam, often used for eyelid comfort.
The Ocular Surface Disease Index, a questionnaire used to measure dry-eye symptom severity.
The area around the eyes, including the eyelids and surrounding skin.
The ingredient blend in many disposable steam masks that warms through controlled oxidation when exposed to air.
A clinical measure of how quickly the tear film becomes unstable after a blink.
The thin multi-layer coating over the surface of the eye that keeps vision comfortable and clear.
The therapeutic use of heat to support circulation, comfort, and tissue function.