More essential, you should wear your new progressive lenses every day from the beginning—from dawn to dusk. If your new progressive lenses do not feel comfortable after two or three weeks of adjustment, your eye doctor would happily assist you further. There are many types of progressive lenses, so it's important to find ones that fit properly and feel comfortable when worn. Progressive lenses were originally designed for people who needed to compensate for nearsightedness or farsightedness. This type of lens has different powers in each eye, so that both eyes can see clear at once. Today, these lenses are also prescribed to correct other vision problems such as astigmatism, field curvature, and color deficiency. The most common type of progressive lenses is the rigid gas permeable (RGP) lens. These lenses contain two parts: a hard plastic center piece that holds the lens in shape, and a softer material called hydrogel on the outside. The hydrogel layer allows moisture to reach the surface of the eye, keeping the lens clean and healthy. People usually need to adjust to their new progressive lenses over time. First, you should get used to how they feel on your face. Then, you should examine yourself in the mirror every morning before going out of the house.