LASIK & Blue-Light Myths: What Science Says

Educational only. Current evidence does not support most blue‑light health claims tied to normal screen use.

At a glance

• Blue light and damage: typical screen exposure has not been shown to cause retinal damage.
• Biggest post‑LASIK issues: temporary dryness, light sensitivity, and night glare—not blue light toxicity.
• Where filters help: comfort and circadian rhythm management in the evening; they do not “protect” the eye from screens.

What science actually says

• Intensity matters: the blue‑light dose from indoor screens is far below sunlight.
• Sleep timing: evening blue light can delay melatonin; night‑mode or warmer color temperature may help some people sleep better.
• Dryness and glare: prolonged near work reduces blink rate and can worsen dryness—especially common in early post‑op.

Practical screen habits after LASIK

• Follow the 20‑20‑20 rule: every 20 minutes, look 20 feet away for 20 seconds and blink deliberately.
• Use preservative‑free artificial tears as directed; add a humidifier in dry environments.
• Adjust brightness/contrast to comfortable levels; avoid high‑glare environments.
• Consider night mode in the evening to support sleep patterns.

Myths vs facts

• Myth: “Blue‑light glasses prevent eye disease.” Fact: They may change perceived comfort for some users; no clear evidence of disease prevention from screen use.
• Myth: “Screens are unsafe after LASIK without special filters.” Fact: Screens are fine; manage dryness and brightness and follow your surgeon’s guidance on early post‑op use.
• Myth: “Blue light causes headaches.” Fact: Headaches have many triggers. If screens bother you, reduce glare, font size, and consider breaks; consult a clinician if persistent.

Bottom line

Focus on dryness management, ergonomics, and sleep‑friendly habits. Blue‑light filters are optional comfort tools—not medical protection devices.