Vision Flashcards
Electromagnetic spectrum
Humans see visible light 400-700nm WL
Vis light is ROYGBIV
Gamma rays-X-rays-UV-vis-infrared rays-micro waves- radio waves
Lacrimal gland
Sup. Lat. drain thru nasolacrimal duct
Tears: water salt mucus
Lysozyme-antibacterial
IgA-antibodies
Lateral rectus
CN VI
Abducens
Medial rectus
Cross eyed
CN III oculomotor
Superior rectus
Elevates
CN III oculomotor
Inferior rectus
Look down
CN III Oculomotor
Inferior oblique
Elevate + lat turn
CN III oculomotor
Superior oblique
Look down + lat turn
CN IV trochlear
Fibrous tunic
Out
Sclera
Cornea
Cornea
Bends light
Light pass
Reduce UV
transparent
Sclera
White of eye
CT
Shape
Protect
Vascular tunic
Middle layer
Choroid
Ciliary body
Iris
Pupil
Choroid
Many blood vessels
Melanin to reduce light scatter
Ciliary body
Produce aqueous humor in anterior chamber
Suspensory ligaments
Focus eye
Connect lens to ciliary process
Intrinsic eye muscles
Ciliary muscles
Radial muscles - outer dialate pupil- sym
Circular muscles - constrict pupil- psym
Iris
Color
Regulates light entering pupil
Radial and circular muscles
Inner eye tunic
Lens
Anterior chamber
Vitreous chamber
Retna
Neural layer
Lens
Clear
Crystallin proteins
Long thin no organelle cells let light
Gap junctions
Anterior chamber
Aqueous humor
Watery
Eye shape
Circulation
Vitreous chamber
Thick
Keeps Retna against choroid
Retna
Where light-nervous impulse-brain
Pigmented layer-melanin
Neural layer
Neural cells before optic nerve sends
Rods/cones photoreceptors
Rhodopsin- bleaching to AP, protein, vA
Central fovea
Optic disc
Rods
Dim light
B&W
120 mil per eye
Peripheral
Cones
Center eye
Color
6 mil per eye
16% blue cones
10% green cones
74% red cones
Central fovea
Macula lutea
Mid eye
Lots of cones
Optic disc
Blind spot
No rods or cones
Farsighted
Too tall eye
Convex lens correction
Hyperopia
Nearsighted
Too squished eye
Concave lens
Myopia
Loss of lens elasticity
Ciliary musc struggle
Presbyopia
