A device for determining the dominant eye of a person. The device comprises a cone having a small hole at its apex which serves as a view port. The cone is attached to a handle, which contains a battery-powered, low-level laser light source that emits light through a light port in the handle. The cone and handle are designed to be made from a single sheet of material.To determine a persons dominant eye, the person holds the device at arms length by the handle. The laser is turned on and the person aims the light at a distant wall. The person looks through the base of the cone through the view port with both eyes open, and locates the laser spot on the distant wall through the view port. The person then closes his right eye. If the laser spot disappears from view, the person is right-eye dominant.
