APP-005 · Lens-plane translator · runs on your device

Glasses VS. Contacts. Not the same number.

Get the RIGHT conversion between contacts and glasses.

Enter your glasses or contacts numbers, or custom measure your eyes:

When contacts and glasses round to different numbers

The bending is the same on both planes; the distance from the cornea changes how much bending is needed. Below −3.50 D the math rounds the contact and the glasses to the same 0.25 D step — no difference printed. Above it, the gap survives the rounding.

Formula: F_contact = F_glass ÷ (1 − d × F_glass), where dis vertex distance in meters. Cylinder usually carries across unchanged unless you're above ~−3.00 cyl.

Why are your eyes blurry in the first place?

The Eyeball Analyzer is a free 20-minute walk-through — your numbers, what made them, what tends to change them back. Same lab.

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Limitations & disclaimer

EndMyopia treats myopia as a refractive state, not a medical condition. This is a free educational tool — not medical advice, diagnosis, or a substitute for a licensed optometrist. Measurements depend on camera quality and how carefully you mark the card edges; expect ±5–10 % on laptops, ±10–15 % on phones. For lens orders, eye health concerns, or any task requiring full 20/20 vision, see a licensed professional.