2 Poudre High School By: Ben Kirk VISIONPoudre High SchoolBy:Ben Kirk
3 Accessory Structures of the Eye Eyelids (Palpebrae): Windshield wipers for the eyes.Lubricate and remove debriLacrimal Caruncle: Produces night boogers.Secreted so that the eyelids don’t stick together.
4 Accessory Structures of the Eye Conjunctiva: Epithelial layer continuous with the inner layer of the eye lid
5 Accessory Structures of the Eye Lacrimal Apparatus: production, distribution, and removal of tearsLacrimal Gland: Superior and lateral to the eyeReleases tears using tear ductLacrimal Canals: Tube by which tears are removed from the eye and enter the Lacrimal Sac
6 Accessory Structures of the Eye Lacrimal Apparatus:Nasolacrimal Duct: Cavity that connects lacrimal sacs to the nasal cavitySwallow or blow out all lacrimal secretions
8 Eye Diseases, injuries, etc… Sty: Infection of sebaceous glands of eyelashes (very painful)Conjunctivitis (Pink Eye): Damage to and irritation of the conjunctivitis
9 Anatomy of the Eye General Facts: Approximately 1 inch in diameter Approximately 8 g in weight
10 Eye Anatomy Posterior/Vitreous Chamber: Filled with vitreous humor (gel like consistency)Used to maintain shape of the eye and hold retina in place
11 Eye Anatomy Anterior Chamber: Separated from posterior chamber by iris and cilliary bodiesFilled with Aqueous Humor (water like consistency)Function: circulation of nutrients and wastes as well as eyeball structure/shape
12 Layers of the EyeFibrous Tunic: Tough outer layer for protection and muscle attachmentSclera: White of the eyeConnective tissue where all extrinsic muscles attach.Cornea: Continuous with scleraFibers are arranged to allow light passage (Cornea appears clear)No blood vessels, very hard to repair
14 Layers of the Eye Vascular Tunic: Middle Layer Iris: Colored region of the eyeMuscles that regulate pupil sizePupil: Opening in the center of the irisCiliary Body: Mass of muscle connected to the lens to change its shapeChoroid: Layer of blood vessels that separates the fibrous and neural tunics posterior to the ciliary bodies.
16 Layers of the Eye Neural Tunic: The Retina Photoreceptors: Rods and ConesRods: Light detection (night vision)Cones: Color DetectionFovea: Focal point of all imagesHighest concentration of conesOptic Disk: Where optic nerve and blood vessels leave the vitreous chamberBlind Spot
18 The Lens:Focuses image on retinaPhysically changes shape
19 Lens Abnormalities Cataracts: Lens becomes cloudy Glaucoma: Increased fluid pressure inside the eye, pinching the optic nerveMyopia: NearsightednessEyeball is too deepHyperopia: FarsightednessEyeball is too shallow