Special FX contact lenses are imprinted with colored patterns to cover the iris of your eye. Custom Theatrical lenses are painted with special pigments to disguise the color of your own eyes. Some styles can be translucent while others are opaque. Unless otherwise noted (Blind or Walking Dead styles), each style has a small area in the center with no pigment so that you can see. The area doesn’t change size in response to light like your own pupils do so the lenses can affect your vision with what is described as a “haze/halo” depending on the lighting situation.
The lenses are also slightly thicker than your daily wear lenses. You will feel them more than your daily wear lenses. While the material is similar, it is not the exact same. You will need to use contact lens drops to keep your eyes moist.