Step 1: Define Myopia.
Myopia, commonly known as nearsightedness or short-sightedness, is a refractive error where the eye focuses incoming light in front of the retina rather than directly on it, causing distant objects to appear blurry.
Step 2: Identify the affected organ.
Since Myopia involves how the eye focuses light, it is entirely a disease of the Eyes. It is corrected using concave lenses, contact lenses, or laser eye surgery.
Step 3: Eliminate other options.
Myopia has no connection to the ears, lungs, or skin. It is a purely vision-related condition.
\[ \boxed{\text{Eyes}} \]