Eye Anatomy

Question 1

Uvea

Answer 1

Pigmented ‘middle-layer’ of the eye beneath the sclera. Made up of iris, ciliary body and choroid.

Question 2

Ciliary body

Answer 2

Production of aqueous

Question 3

Trabecular meshwork

Answer 3

Drainage of aqueous

Question 4

Cornea

Answer 4

-Transparent
-Avascular
-Consists of epithelium (which fluorescein dye stains), bowman’s layer, stroma, Descemet’s membrane, endothelium

Question 5

Extracranial visual pathway

Answer 5

-Rod and cones within the retina send impulses via the retinal ganglion cells. This forms the optic nerve
-The ON leaves the orbit via the optic canal, entering the cranial cavity

Question 6

Intracranial visual pathway

Answer 6

-Optic Nerve unite in Middle cranial fossa to form chiasm
-Chiasm: Nasal fibres of retina crossover to the contralateral optic tract. The temporal fibres remain ipsilateral
-Optic tract travels to the corresponding cerebral hemisphere to reach LGN Axons from LGN then carry information through the optic radiations.

Question 7

Retinal circulation

Answer 7

-Central retinal artery
-Retinal arterioles
-Retinal capillaries
-Retinal venules
-Retinal veins
-Central retinal vein
=Supplies the inner 2/3 retina
=Outer 1/3 of retina supplied by diffusion from choroidal circulation