Computer Glasses Calculator
Enter your full prescription to calculate the ideal power for screen use
Enter Your Prescription
Enter your current glasses prescription (with reading add)
The Add power is required - this is your reading/near add from your prescription
How Computer Glasses Work
Reading Add @ 40cm
Your full reading add is designed for close work at about 40cm (16 inches)
Computer @ 60cm
Screens are farther away, so you need less add power—typically 60-70% of reading add
Reduced Eye Strain
Proper intermediate power means comfortable all-day computer use without leaning in
Screen Distance Quick Reference
Percentage of your reading add needed for each distance
Frequently Asked Questions
Reading glasses are optimized for 40cm (16 inches) - typical book distance. Computer screens are usually 50-70cm (20-28 inches) away. Using reading glasses for computer work forces you to lean in uncomfortably close, or you'll see the screen blurry. Computer glasses provide clear vision at the intermediate distance.