Retina
The retina is the inner posterior surface of the eye, consisting of many layers that absorbs light through rods and cones, which are photo-receptor cells.
Structure[edit | edit source]
The retina has an optic part, which is sensitive to light, a non-visual part that covers the internal surface of the ciliary body and iris; as well as an optic disc, which is the blind spot of the retina as it contains retinal vessels.
1. Pigmented Layer[edit | edit source]
The pigmented layer is attached to the choroid and continues anteriorly over the internal surface of the ciliary body and iris.
2. Neural Layer[edit | edit source]
This is attached to the pigmented layer around the optic nerve and Ora Serrata.
3. Macula Lutea[edit | edit source]
Macula lutea is the structure that has the fovea near its center. It has more cones than rods (100 million:6 million).
Vasculature[edit | edit source]
The central retinal artery at the optic disc gives off:
- Superior temporal retinal arteriole and venule
- Inferior temporal retinal arteriole and venule
- Superior nasal arteriole and venule
- Inferior nasal arteriole and venule
- Superior macular arteriole and venule
- Inferior macular arteriole and venule
Links[edit | edit source]
Bibliography[edit | edit source]
- SNELL, Richard S. Clinical Anatomy by Regions. 8th Edition edition. 2004. ISBN 978-0-7817-6404-9.
