According to the analysis, the answers are as follows: (1) The part of the eye that is often called "white eyeball" is [6] sclera; The part often called "black eyeball" is [2] iris with a pupil in the center.

(2) The formation process of vision is: light from the object → cornea → (watery fluid) → (pupil) → (ciliary body) → vitreous body → (retina) → optic nerve → visual center of cerebral cortex. When enjoying a wonderful football match, normal people's eyes will form a clear image of the object on the retina, while vision is formed in the cerebral cortex.

(3) Protecting the eyes and preventing myopia can also effectively prevent myopia by achieving "three musts" and "four noes". The so-called "three essentials" include: (1) correct posture when reading and writing, the distance between eyes and books is about 33 cm, and the distance between eyes and TV screen when watching TV is preferably 3 meters, not less than 2-2.5 meters. Can effectively eliminate eye fatigue. (3) Do eye exercises seriously. And "four don't read": (1) Don't read in direct glare. (2) Don't read in the dark. (3) Don't read while lying down. (4) Don't read while walking. However, for us primary and middle school students, the most important and effective way to prevent myopia is to do it seriously and accurately every day.

So the answer is: (1) 6; Scleral; 2; iris

(2)8; retina

(3)4; crystalline lens