Anatomy study note · Head and neck

Retina

The inner nervous coat of the eyeball: an outer pigmented layer and an inner nervous layer. The posterior three-quarters is the receptor organ.

Key points

• Pigmented + nervous layers; ends at the ora serrata.
• Macula lutea + fovea = sharpest vision.
• Optic disc = blind spot (no rods/cones).
• Central retinal artery = end artery.
• Outer wall → pigment layer; inner wall → neural retina.
• Rods: rhodopsin, dim light. Cones: colour, fovea.
• Photoreceptor → bipolar → ganglion cell.

The full note in the atlas also covers

Features · Blood supply · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 12, PDF pp. 1585–1586, 1598–1600, 1684
• Inderbir Singh’s Human Embryology, ch. 19, PDF pp. 352, 355–356
• BRS Cell Biology & Histology, 7th ed., ch. 21, PDF pp. 384–386

More from the head and neck

• Salpingopharyngeus
• Scalenus anterior
• Scalenus medius and posterior
• Sclera
• Skull
• Sphenoid bone
• Sternocleidomastoid
• Sternohyoid
• Sternothyroid
• Stylohyoid
• Stylopharyngeus
• Subclavian artery

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