preretina
/ˌpriːˈrɛtɪnə/Anatomy rare
noun
The forward continuation of the retina as a thin layer of pigmented epithelium running from the ora serrata over the ciliary body and posterior surface of the iris; the ciliary and iridic parts of the retina.
Origin
Late 19th century; earliest use found in The Century Dictionary. From pre- + retina.