Myopia - more commonly known as "nearsightedness", is caused when the eyeball is too long and /or the cornea is to curved. Light does not focus properly, causing people with myopia to have difficulty seeing distant objects.

Squinting to see the television and inability to read signs or the blackboard are usually indications of myopia. Difficulty seeing distant objects usually develops before age 20, and first occurs in school-age children.

Myopia - also known as nearsightedness causes difficulty seeing distant objects