Myopia (Nearsighted) – unable to see at distance, able to see at near. If you wear contacts the sign in front of the prescription number is a minus (-).
(example: -4.50 soft contact lens power)

Nearsighted, over 40:

Nearsighted, under 40:

Very Nearsighted:

Nearsightedness (Myopia) occurs when the eyeball is long, or the eye's focusing mechanism (the cornea and lens) is too powerful, causing light rays to focus in front of the retina. People with this condition can see near objects clearly, but not ones at a distance. Lenses made to correct this common condition are thinner in the center than at the edges to redirect light rays to the retina. These lenses are called 'minus' or concave lenses.