How the eyes see
See how common eye diseases and prescriptions affect vision — and what glasses, progressive, polarized and photochromic lenses change. It also works with your phone camera.
OpenInteractive tools
Simulators
See how different eye conditions affect vision and what glasses change. Each simulator opens in a new tab.
The tools for specialists are available in Bulgarian.
For patients
For specialists
Calculators for opticians
Quick calculations for ordering and consultation: blank size, vertex distance, transposition, prism and decentration, near PD, addition, thickness and weight, frame tilt and axis error.
Open