Contact Lens Solution Is

contact lens
A thin lens, made of flexible or rigid plastic, that is placed directly on to the eye to correct vision, used as an alternative to spectacles, or, if coloured, to change one's eye color cosmetically
A thin plastic lens placed directly on the surface of the eye to correct visual defects
A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye.
contact: a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication

solution
A means of solving a problem or dealing with a difficult situation
a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"
The correct answer to a puzzle
Products or services designed to meet a particular need
a statement that solves a problem or explains how to solve the problem; "they were trying to find a peaceful solution"; "the answers were in the back of the book"; "he computed the result to four decimal places"
a method for solving a problem; "the easy solution is to look it up in the handbook"