Optical Solution is a term used to describe EYEWASH, which is a type of solution used to flush out the eyes in case of an emergency. It is typically used to remove irritants such as dust, dirt, or chemicals that may have come into contact with the eyes. EYEWASH is usually composed of sterile saline solution and is available in both pre-mixed and concentrate forms. It is important to use EYEWASH immediately after exposure to any foreign substance in order to reduce the risk of further irritation or infection.