In the myopic eye accommodated for distance the focal point lies in the interior of the eye in front of the retina, with the result that visual acuity is reduced for distance vision.
To permit sharp distance vision again, the excessive refractive power must be corrected by a minus lens in such a way that the focal point of the lens/eye system once again lies on the retina. In myopia the  far point MR lies at a finite distance in front of the eye.
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.gif) axial and refractive ametropia
Myopic eye
Myopic eye with correcting minus lens | Vision demos
interactive animations
Human Eye
Emmetropia
Ametropia
Myopia
Hyperopia
Presbyopia
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