Massage. Massage your muscles to relieve tightness. Use lotion or baby oil to decrease friction between your fingers and your skin while you massage. Apply firm but pain-free pressure and move slowly in a circular pattern along the length of the tight muscle.
Noun. 1. laser-an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light. optical maser. optical device-a device for producing or controlling light.
The laser mouse is a hardware device with latest technology whereas optical mouse is a relatively old technology. In terms of normal people, both the mice have light underneath them but one has LED and other has infrared laser distinguishing it from each other.