Blue light and your eyes

Why can screens feel tiring?

• Long periods of close work and less frequent blinking can leave eyes dry or tired. This does not mean blue light has injured the retina.
• Reduce glare, use comfortable brightness and enlarge text rather than leaning closer. Blink regularly and take breaks.

Do blue-light glasses help?

• Studies suggest blue-light-filtering lenses may offer little or no short-term relief of computer eye strain compared with ordinary lenses. Benefits for sleep remain uncertain; protection of the retina has not been established.
• These filters are different from prescription lenses you may need for clear, comfortable vision.

Screen use before bedtime

• Evening light and screen use can interfere with the body’s sleep–wake rhythm. Reduce screen time before bed and keep a regular sleep routine.
• If you use a device in the evening, lower brightness or try a warmer night setting. This is a comfort adjustment, not guaranteed eye protection or a substitute for putting the device away.

Daylight and outdoor protection

• Sunlight is a larger source of blue light than screens. Blue light and ultraviolet (UV) radiation are different.
• Outdoors, use sunglasses with proper UV protection. A blue-light filter alone does not establish UV protection.

When to arrange an eye check

Persistent dryness, headaches or blurred vision need an eye assessment rather than simply buying a filter. Seek urgent help for sudden vision changes, significant pain or a very red eye; do not assume these symptoms are from screen use.