When a manufacturer tells you they make a spherical-aberration-free finite-conjugate double-aspheric lens, what do you say to them? That'll be the problem I'll have should I ever meet up with ...

If you wear bifocal or even trifocal eyeglasses, then you will know what a hassle it can be having to tilt your head up to see things that are nearby. The areas of image softness or distortion can ...

Distortion check This function displays the lens distortion of glasses being used by the customer by obtaining the vertex power difference from the nosepiece aperture at the center to those of eight ...

St. Charles Vision (Citywide; www.stcharlesvision.com) now offers Zeiss GT2 3D digitally customized lenses, providing a wider field of vision, better peripheral vision and less distortion for people ...