1 / 18

Lecture 1: Eye Anatomy

Lecture 1: Eye Anatomy. Liana Al-Labadi, O.D. Eye Anatomy. Eye Anatomy. The orbital bone The eye socket Formed by: Cheekbone Forehead Temple Side of nose Eye is cushioned within orbit by pads of fat Lacrimal gland Produces tears Tears drain through the nasolacrimal duct.

Download Presentation

Lecture 1: Eye Anatomy

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Lecture 1: Eye Anatomy Liana Al-Labadi, O.D.

  2. Eye Anatomy http://everlastingelephants.blogspot.com/2009/08/what-is-eye-cataract.html

  3. Eye Anatomy • The orbital bone • The eye socket • Formed by: • Cheekbone • Forehead • Temple • Side of nose • Eye is cushioned within orbit by pads of fat • Lacrimal gland • Produces tears • Tears drain through the nasolacrimal duct http://commons.wikimedia.org/wiki/File:Eye_orbit_anatomy_anterior2.jpg http://mwsu-bio101.ning.com/forum/topics/distinct-human-celltypes-1?commentId=2263214%3AComment%3A10331

  4. Eye Anatomy • Eyelids (L): • Protection: • Protects eye from foreign matter (dust, dirt, debris) • Protects against bright light that might damage the eye • Help spread tears over surface of eye- moist & comfort • Eyelashes (L): • Filter out foreign matter • prevent it from getting into eye http://www.medical-look.com/human_anatomy/organs/Eyelids_and_eyelashes.html

  5. Eye Anatomy • Conjunctiva (Conj): • Thin, clear layer of skin • Covering of the front of eye • Covers the sclera and the inside of the eyelids • Function: • Keeps bacteria and foreign material from getting behind eye http://www.images.missionforvisionusa.org/anatomy/2005/11/conjunctiva-answers.html

  6. Eye Anatomy • Sclera (S): • “White of the eye” • Tough, opaque tissue that extends around the eye • Surrounds the eye and gives the eye its shape • The sclera is attached to the extraocular muscles http://www.thirdeyehealth.com/sclera.html

  7. Eye Anatomy • Extraocular Muscles • 6 extraocular muscles that are attached to each eye • Help move the eye left, right, up, down and diagonally • These 6 muscles are: • Superior rectus • Inferior rectus • Medial rectus • Lateral rectus • Inferior oblique • Superior oblique http://media.photobucket.com/image/introduction%20to%20eye%20anatomy/trimurtulu/Eye.jpg

  8. Eye Anatomy • Cornea (K): • Clear layer at the front & center of eye • Located in front of the iris (colored part of eye) • Function: • Focus light as it enters eye • Avascular • Only organ that has no blood vessels http://commons.wikimedia.org/wiki/File:Cornea.jpg

  9. Eye Anatomy • Anterior Chamber (AC): • Fluid-filled space • Behind the cornea & in front of the iris • Fluid = Aqueous humor (AH) • AH helps nourish the cornea & the lens http://www.djo.harvard.edu/files/2528_310.jpg • http://www.goodhope.org.uk/departments/eyedept/angleclosureetc.htm

  10. Eye Anatomy • Pupil (P): • Central opening of iris • Iris (I): • Ring shaped tissue • Colored part of eye • Controls the amount of light that enters the eye • Two muscle fibers: • Contraction • Constricts pupil in bright light • Dilation • Dilates pupil in dark http://www.bioconsulting.com/Bio_Tech_Assessment.html • http://www.goodhope.org.uk/departments/eyedept/angleclosureetc.htm

  11. Eye Anatomy • Anterior Chamber Angle • Located where the cornea meets the iris • Trabecular Meshwork • Site where aqueous humor drains out of eye • If AH cannot properly drain out • Pressure build up inside eye • Causes optic nerve damage & evetually vision loss = glaucoma http://seniorhealth.about.com/library/conditions/blglaucoma2.htm

  12. Eye Anatomy • Posterior Chamber (PC): • Fluid-filled space • Aqueous Humor! • Immediately behind the iris but infront of the lens http://seniorhealth.about.com/library/conditions/blglaucoma2.htm

  13. Eye Anatomy • Crystalline Lens: • Clear, flexible structure • Behind the iris & pupil • Surrounded by a ring of muscular tissue – ciliary body • The lens & ciliary body help control fine focusing of light as it passes through the eye http://www.smartplanet.com/business/blog/smart-takes/artificial-lens-implant-to-give-patients-high-definition-vision-better-than-2020/2558/

  14. Eye Anatomy • Vitreous Chamber: • Located behind the lens & in front of the retina • Filled with a gel-like fluid called the vitreous humor • The vitreous help maintain the shape of the eye http://www.ophthobook.com/questions/question-how-many-chambers-are-there-in-the-eye

  15. Eye Anatomy • Retina: • Acts like the film in a camera to create an image • Consists of a specialized layer of cells • Converts light signals into nerve signal then send these signals to the optic nerve • Optic nerve carries the signals to the brain • The brain helps process the image • Rods- low light situations • Cones- allows you to see color hhttp://www1.appstate.edu/~kms/classes/psy3203/EyePhysio/human_retina.htm http://www.answersingenesis.org/tj/v13/i1/retina.asp

  16. Eye Anatomy • Macula • Located in the central part of the retina • Responsible for giving sharp central vision • Used for reading, recognizing faces, and watching TV • Any disease that affects the macula will cause a change & impairment in the central vision http://www.dukehealth.org/eye_center/specialties/macular_degeneration/care_guides/macular_degeneration_frequently_asked_questions

  17. Eye Anatomy • Choroid • A layer of tissue that is: • Located under the retina • Separates retina & sclera • Mostly made up of blood vessels • Helps nourish the retina by carrying the blood supply to the eye’s internal structures http://www.cnib.ca/en/your-eyes/eye-conditions/amd/the-eye/basics/Default.aspx

  18. Eye Anatomy • Optic Nerve • A bundle of 1 million nerve fibers • Responsible for transmitting nerve signals from the eye to the brain • The optic disc is the front surface of the optic nerve • The optic disc is visible on the retina http://cssd.us/body.cfm?id=802 http://www.wollongong.youronlinecommunity.com.au/wollongong-online/2008/50/walkthrulife/eye-health.html

More Related