Retina

From WikiLectures

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.

Fundoscopic view of the retina

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.