PA- lec, Eye Anatomy

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PA- lec, Eye Anatomy
2015-06-18 10:25:18
PA lec
PA,exam 1
PA Anatomy
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  1. What protects the eye
    • Boney orbital cavity
    • eyelids
    • eyelashes
  2. What does it mean when you say "the lid margins approximate completely"?
    The eyelids close completely
  3. Where do the upper lids cover when open
    the top of the iris
  4. What do the lower lids cover while open?
    come to the limbus (border between cornea and sclera
  5. Describe the Tarsal Plates
    • upper lateral part of lid
    • sebaceous glands
    • helps lid margins approximate completely
    • secrete lubricant so tears do not overflow
  6. What are the 2 types of conjunctiva?
    • Palpebral- covers inner lids
    • bulbar- covers scleral
  7. How do you describe the conjunctiva when they are healthy?
  8. What is the red reflex?
    Red light seen when using an opthalmoscope, light is bouncing off of the blood vessels
  9. Where is the lacrimal Gland?
    Superior and lateral to the eye
  10. Describe the flow of tears
    Produced by lacrimal gland > drain into PUNCTUM > down nasolacrimal duct > nose >nasopharynx
  11. Name the 3 coats surrounding the eye
    • Sclera
    • Choroid
    • Retina (transparent vitrous body)
  12. What parts of the eye can we see?
    • Sclera
    • Retina
  13. What is the Sclera?
    • White of eye
    • continuous with the cornea
  14. Describe the cornea
    • helps bend light toward retina
    • sensitive to touch
    • Corneal Reflex
  15. Describe the Choroid
    • Vascular
    • Dark, light does not reflect off of it
  16. What is CN V
    • Trigeminal
    • Touch
  17. What is CN VII
    reaction to touch sent to brain
  18. What is the purpose of the iris?
    to contract/dilate pupils with muscles
  19. Describe the pupil
    • Should be round and regular
    • Parasympathetic-Constricts (CN III)
    • Sympathetic- Dilates
  20. Describe the lens
    • biconvex disk
    • bends to keep light focused on retina
    • Bulges for near objects
    • Thins for far away objects
  21. Anterior Chamber
    • posterior to cornea, anterior to iris/lens
    • has aqueous humor
    • delivers nutrients and drains metabolic waste
  22. Intraoccular Pressure
    Amount of aqueous humor and resistance to outflow of humor from eye
  23. What is Glaucoma?
    Build up of intraoccular pressure
  24. Describe the retina
    • visual receptive area
    • where vision is converted into nerve impulses
    • Optic disk, retinal vessels, macula
  25. What can you see with an Opthalmoscope?
    • Optic Disk
    • Retinal Vessels
    • Background
    • Macula
  26. Describe the optic disk
    • fibers of retina converge to form optic nerve (CN II)
    • on nasal side of retina
    • Color from yellow/orange to pink
    • round/oval
    • distinct outline on the temporal side
  27. What is the physiological cup?
    Middle of optic disk where blood vessels and veins enter/exit
  28. What are the Retina vessels?
    • 4 pairs of arteries/veins
    • thicker towards physiological cup
    • Arteries are brighter red and narrower than veins, arterial light reflex
  29. Describe the macula
    • on temporal side
    • darker in color than rest of background
    • Has fovea Centralis-sharpest part of vision
  30. What is the fovea centralis?
    the sharpest part of vision
  31. What is Conjugate movement of the eye?
    The eyes moving together