In the eye's case, however, the film screen is your retina. Your retina is in the very back of the eye. It holds millions of cells that are sensitive to light. The retina takes the light the eye receives and changes it into nerve signals so the brain can understand what the eye is seeing. A Muscle Makes It Work
Dentures, also known as false teeth, are prosthetic devices constructed to replace missing teeth; they are supported by the surrounding soft and hard tissues of the oral cavity.
Dentists have a name for the grinding and clenching of teeth. It's called bruxism. If you do it at night, it's called sleep bruxism. Many times, dentists notice the condition because when it becomes severe enough, it can cause damage to the enamel of your teeth.