This paper suggested that continual and short-distance use of eyes for long time and narrow environment visual field were the main reasons for the abnormal vision.

In the US, roughly one-third of our children, although born with normal vision, end their school years with abnormal vision, condemned to wearing glasses the rest of their lives.

Since there is little bleeding, the surgeon maintains a clear field of vision during the procedure, enabling complete removal of the abnormal tissue while avoiding critical nerves and blood vessels.