Myopia is a refractive defect of the eye in which collimated light produces image focus in front of the retina when accommodation is relaxed.
Those with myopia see near objects clearly but far away objects appear blurred. With myopia, the eyeball is too long, or the cornea is too steep, so images are focused in the vitreous inside the eye rather than on the retina at the back of the eye. The opposite defect of myopia is hyperopia or "farsightedness" or "long-sightedness"-this is where the cornea is too flat or the eye is too small.
I'm not familiar with the term "myophia." It may be a misspelling or a non-standard term. Please provide more context or clarify the term so I can better assist you.