All device optimizations come after habits: the 20-20-20 rule, a viewing distance of 50-70 cm, conscious full blinking, the screen slightly below the line of sight, and reducing brightness and color temperature one hour before going to bed. These interventions are cost-free and have solid evidence, making them the top priority in eye fatigue management.
This special topic compiles behavioral suggestions into an executable list and honestly marks them as follows: The optimization of film application products lies in the "light quality and reflection" aspect, which cannot replace any habit intervention and is not effective in preventing myopia.
A quick overview of key terms
Ciliary muscle
The ciliary muscle achieves focal length adjustment (adjustment function) by changing the curvature of the lens. Prolonged close-range eye use keeps it tense continuously, which is the core link in visual fatigue and pseudo-myopia. ... (Focus on this page: Eye Usage Habits Special Topic: Zero Cost's Top Priority)
Blink frequency
The blink rate refers to the number of blinks per minute. It drops significantly when concentrating on screen use (from 15 to 20 times per minute to around 5 times per minute), leading to accelerated evaporation of the tear film and dryness. ... (Focus on this page: Eye Usage Habits Special Topic: Zero Cost's Top Priority)
Myopia prevention and control
Myopia prevention and control is a systematic project centered on outdoor activities, eye distance and duration management, and lighting environment. "Two hours outdoors every day" is an intervention with a relatively high level of evidence. ... (Focus on this page: Eye Usage Habits Special Topic: Zero Cost's Top Priority)
Eye hygiene
Eye hygiene refers to a set of behavioral norms surrounding screen usage: the sum of distance, duration, light, posture, blinking and rest rhythm. ... (Focus on this page: Eye Usage Habits Special Topic: Zero Cost's Top Priority)
Related reading
- A Guide to Eye Use during Long Online Classes: Three Dimensions: Devices, Lighting, and Habits
- Key points for eye use at night: Balance between ambient light, brightness and blue light