Visual Pathway

 

1.)  Light enters pupil→aqueous humor→lens→vitreous humor, detected by Photoreceptors in Retina.

 

2.)    Electrical stimulation passed to Bipolar Cells→Glaglion cells of retina

 

3.)   Axons of Ganglion cells leave retina, forming Optic Nerve

 

4.)  Optic nerves converge at Optic Chiasm. Ganglion axons decussate/cross over to opposite side of brain

 

5.)  Ganglion axons enter Optic Tract, some to the Superior Colliculi, some to Thalamus

 

6.)  Neurons from Thalamus project to Visual Cortex of Occipital lobe

 

Eye Structure

Function

Eyebrows

Prevent sweat dripping

Eyelashes

Prevent –

Eyelids

Protect from sun/foreign particles

Conjunctiva

Prevents –

Tarsal Glands

Containing sebaceous glands to prevent tear overflow and lids sticking together

Extrinsic Muscles

Lacrimal apparatus

Choroid

Suspensory lens

Ciliary body

 

 

Eye Structure

Histology

Conjunctive

Stratified –

Cornea

Dense Connective Tissue, outer layer of –

Sclera

Choroid

Vascular – network of capillaries

Anterior cavity

Posterior cavity

Filled with Vitreous humor

 

 

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