Is Nearsightedness Due to the Eyeball Being Too Long?

When a person becomes nearsighted, the axial length of their eyeball (the distance from the cornea to the retina) may increase, resulting in axial myopia.
When a person becomes nearsighted, the axial length of their eyeball (the distance from the cornea to the retina) may increase, resulting in axial myopia.

Myopia (Nearsightedness): Causes, Symptoms &Treatment

Is it Genetic to be Near-sighted, Far-Sighted or Astigmatic?

Is it possible to reverse or slow down myopia progression through

What is Nearsighted and Farsighted Vision? - InVision Optical

Nearsightedness and Farsightedness

What is Myopia (Nearsightedness)?

Nearsightedness (Myopia)

Nearsightedness caused by more time on screens, less time outdoors

Nearsightedness: Genetics and More - 23andMe

Nearsightedness Vs. Farsightedness