A progressive lens design is like a bi- or tri-focal lens in that it corrects more than one vision problem at a time. However, these lenses have no visible lines, improving the cosmetic appearance of ...

Whether you prefer dailies or monthlies, have astigmatism, or tend to get dry eyes, here are the best contact lenses ...

This type of lens is known as an Anastigmat ... The third lens corrects the distortion from the first two and flattens the rays onto the image plane. From US Patent US20170299845A1 Then we ...