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.

Ways To Prevent Nearsightedness (How To Prevent Myopia)

Myopia (Nearsightedness) Q&A

What is Myopia? Facts about Nearsightedness in Children

Eye Defects - Myopia Its Causes, Symptoms, and Treatment

Nearsightedness

Does Myopia Always Get Worse As You Age?

Vector Realistic Human Eyeball. Eye With Bright Blue, Illustration

The cause of is excessive curvature of the eye lens and elongation of the eyeball.

Myopia (nearsightedness): A Pervasive Disease - Insight Vision Center Optometry