Which finding extends the peripheral retina onto the pars plana?

Which finding extends the peripheral retina onto the pars plana?

• A. Dentate processes
• B. Oral bays
• C. Oral bays and Dentate processes
• D. None

Answer: (A)

The boundary between neural retina and the ciliary body is the ora serrata, a jagged border at the peripheral retina. At this border, tooth‑like projections called dentate processes extend from the neural retina onto the pars plana, effectively pushing retinal tissue into that ciliary body region. The oral bays are the indentations between these projections and do not themselves carry retina onto the pars plana. So, the structure that extends the peripheral retina onto the pars plana is the dentate processes.