As we all known, a contact lens, or simply contact, is a lens placed on the eye. At first, contact lenses don't have any colors but white and light blue. With the technology development and cultural spreading, colored contact lenses begin to come into being. Now we can see more and more people who wear colored contact lenses, especially stars, for instance, Brad Pitt wears blue contact lenses. Tim Minchin also wears blue contact lenses on stage. Well, your confusion is really not confusion. You can see through the colored contact lenses indeed. On the contrary, colored contact lenses even can adjust your vision. For those with certain color deficiencies, a red-tinted "X-Chrom" contact lens may be used. Corrective contact lenses are designed to improve vision, most commonly by correcting refractive error. Meanwhile, most people chose colored contact lenses just for a cosmetic contact lens is designed to change the appearance of the eye.