Decreased or disappeared eye adjustment function

The eyeball, like the brain, is an organ rich in nerves and blood vessels, and carries extremely complex physiological functions. In order to see the object at a close distance, the contraction of the intraocular muscle-ciliary muscle increases the curvature of the lens in the eye, thereby enhancing the refractive power of the eye, and forming a clear image of the object at a short distance on the retina. The ability to see near objects and change the refractive power of the eye is called the eye's regulating function. Loss or disappearance of eye adjustment can cause vision loss.