Quick answer: Because blue light isn't what's straining your eyes. Daytime eye strain comes from blinking less, focusing up close for hours, glare, and brightness, so a blue-light filter alone won't fix it. The glasses are a comfort layer, not a cure.
What's really causing it
- Reduced blinking (your eyes dry out)
- Focusing at one close distance for hours
- Glare and a too-bright screen
- Poor posture and screen position
- Uncorrected vision or an outdated prescription
What actually helps
- The 20-20-20 rule (look 20 ft away every 20 minutes)
- Match screen brightness to the room; raise text size
- Blink fully, hydrate, use drops if dry
- Take real breaks and fix your monitor height/distance
- Get an eye exam if it persists
The bottom line: If your eyes hurt even with blue light glasses on, the glasses aren't the problem, your screen habits are. Fix brightness, blinking, breaks, distance, and posture, and use the glasses for glare comfort and evening sleep on top.
