Hard Contact Lense Solution

contact lense
A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye.

solution
A means of solving a problem or dealing with a difficult situation
Products or services designed to meet a particular need
The correct answer to a puzzle
a method for solving a problem; "the easy solution is to look it up in the handbook"
a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"
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"

hard
difficult: not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?"
dispassionate; "took a hard look"; "a hard bargainer";
Solid, firm, and resistant to pressure; not easily broken, bent, or pierced
with effort or force or vigor; "the team played hard"; "worked hard all day"; "pressed hard on the lever"; "hit the ball hard"; "slammed the door hard"
(of a person) Not showing any signs of weakness; tough
(of information) Reliable, esp. because based on something true or substantiated