unit 2 Flashcards
cn 2
optic nerve * Main nerve for providing vision
cn 3
Oculomotor Nerve
cn 4
- Innervates superior oblique muscle eye movement
cn 5
CN V - Trigeminal Nerve
CN VI
Innervates lateral rectus muscle (LR)
Function: eye movement LR
cn 7
Facial Nerve
Innervates Lacrimal and Salivary Glands
arteries
blood away from the heart; Bringing blood to the eye.
- Internal carotid
enters the head via the carotid canal.
how many vortex vein drain retina
- 4 to 8 vortex veins drain retina
- Macula
fovea
3-5mm diameter area
1.5mm
Visual Pathway of Light
- Cornea
- Anterior chamber
- Pupil
- Lens
- Vitreous chamber
- Retina
◦ Macula
◦ Fovea - Optic Nerve
- Layers of the cornea
◦ Epithelium
◦ Bowman’s layer
◦ Stroma thickest layer
◦ Descemet’s membrane
◦ Endothelium
Conjunctiva
covers the sclera or white part of the eye
Ciliary body
Controls accommodation
Trabecular meshwork
Filters aqueous fluid
Choroid
◦ Large vessels are more exteriord
Vitreous humour
◦ Mostly water; Some collagen
- Function of RPE
◦ Melanin absorbs stray light
◦ Transport of metabolites
◦ Barrier to protect photoreceptors
◦ Regeneration of visual pigments (rods and cones)
◦ Phagocytosis of photoreceptor tips
Uveal Tract has
- Iris
- Ciliary body
- Choroid
