In the posterior segment, its dorsoventral axis was the longest, and could be divided into two parts: the dorsal and the ventral parts.
后段的背腹径最长,可分为背侧部和腹侧部,两部分的细胞分界清晰。
英语百科
Posterior segment of eyeball
The posterior segment is the back two-thirds of the eye that includes the anterior hyaloid membrane and all of the optical structures behind it: the vitreous humor, retina, choroid, and optic nerve.
Some ophthalmologists specialise in the treatment and management of posterior segment disorders and diseases.