Special Senses Lab
Lacrimal Gland
produces and drains tears
Lacrimal Canal
drains tears into lacrimal sac
Nasolacrimal duct
drains tears into lacrimal activity
Superior and Inferior rectus muscle
Extrinsic Eye Muscles
Superior and Inferior Oblique Muscle
Extrinsic Eye Muscles
Lateral and Medical Rectus Muscle
Extrinsic Eye Muscles
Central Fovea
highest visual activity
Retina's Pigemented Layer
outer portion; absorb stray light rays
photoreceptor, bipolar cell, ganglion
Neural Layers
Photoreceptor Layer
contains rods and cons
Rods
for night vision and low light
Cones
for color and better visual activity
Bipolar Cell
synapses with ganglions
Ganglion
cotains ganglion cells with axons that merge and extend through the optic disc into the optic nerve
Accessories of the Eye
eyebrows, eye lids, eyelashes, conjuctiva, lacrimal apparatus, extrinsic eye muscle
Conjuctiva
thin protective membrane that covers the anterior eye
Palpebral Conjunctiva
covers interior of the eyelid
Bulbar conjuctiva
covers the anterior portion of the white eye
lacrimal apparatus
produce and drain tears
Optic Disc (blind spot)
loc: Retina, does not contain photoreceptors
Vascular tunic
composed of iris, cillary body, and cornea
Iris
composed of circular and a radial smooth muscle and controls the size of pupil
Pupil
opening in the middle of the iris allowing light to enter the eye ball
Cilliary Body
found posterior to the iris at juntion of cornea and scelera