1. Sense of Sight Upload 10.15 Sense of sight notes

2. Watch this video to get started Standard Deviants Eye Anatomy

3. TUNICS- Layers of tissue forming the walls of the eye HUMORS- Fluids of the eye OPTICAL COMPONENTS- transparent elements that emit light rays and focus them on the retina NEURAL COMPONENTS The series of slides that follow will help you learn the structures of the eye as well as the various functions. 1. Read the hint 2.Use the word bank to identify the structure 3.Record all information on your diagram

4. cornea Hint: Transparent outer layer of the eye choroid coat Suspensory ligaments iris pupil fovea retina sclera 1

5. Hint: Controls the amount of light entering the eye choroid coat Suspensory ligaments iris pupil fovea retina sclera 2

6. Hint: Circular opening for light choroid coat Suspensory ligaments pupil fovea retina sclera 3

7. Hint: Helps change the shape of the lens choroid coat Suspensory ligaments fovea retina sclera 4

8. Hint: Contains the photoreceptors choroid coat fovea retina sclera 5

9. Hint: Contains blood vessels for nourishment and melanocytes to absorb excess light choroid coat fovea sclera 6

10. Hint: Forms the white of eye, Protects eye, Provides attachment for muscles fovea sclera 7

11. Hint: Region of retina that produces the sharpest vision fovea 8

12. Hint: Watery, Helps nourish space behind cornea Hint: Jelly-like, Maintains the shape of the eyeball Aqueous humor Vitreous humor 9 10

13. Hint: Changes shape to focus light on the retina 11Lens These structures also help focus light on the retina: Cornea Aqueous humor Vitreous humor

14. Cataracts appears as a cloudy lens. Click on the picture to view a video on cataract surgery. It’s Interesting!

15. Hint: Area where nerve fibers leave the retina and join the optic nerve Blind spot Optic nerve Hint: Transmits messages to occipital lobe 12 13

16. Fill in the chart Organ of sight? Eye

17. Receptor? Photoreceptors The retina contains the photoreceptors: rods and cones. Rods sense black and white Cones sense color

18. Glaucoma: Damage to the optic nerve due to too much pressure. Click on the picture to watch the video.

19. Interpretation? Occipital Lobe

20. Accessory Organs of the Eye 1.Eyelid - protection 2. Lacrimal apparatus -secretes tears which moistens the eye -tears contain enzymes that act as antibacterial agents -ducts drain the tears into the nasal cavity

21. 3. Extrinsic muscles- move the eye Use your knowledge of directional terms to determine the location of each extrinsic eye muscle. Superior rectus Superior oblique Inferior rectus Inferior oblique Lateral rectus Medial rectus

22. Think about what would happen if a particular muscle contracted. Match the action to the correct muscle. Abduction Adduction Elevation Extorsion (rotates the top of the eye away from the nose) Intorsion (rotates the top of the eye toward the nose) Depression

23. Conjunctivitis: Infection of the mucous membranes lining the eyelid. When you finish (and if you don’t have conjuctivitis) ask your teacher for homework. Homework is due next class.