sensory eye
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| Optic Disk | Blind Spot
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| Function of ophthalmic branch of Trigeminal nerve | Impulses of pain, touch, temp. from eye and surrounding parts of bran
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| Optic Nerve function | Cranial nerve II. Visual impulses from rods and cones to brain
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| Ciliary muscle function | adjusts thickness of lens to accommodate for near and far vision
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| Funtion of the Iris | regulate amount of light entering eye by adjust size of pupil to
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| Process of accommodation | allows focus on near objects. Involves change in thickness of lens.
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| Suspensory ligaments | Part of Ciliary muscle (A filament) That holds lens in place
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| Iris | The colored portion of the eye
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| Pupil | The Iris's central opening
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| intrinsic muscle form these | Iris and Ciliary muscle
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| intrinsic muscles | Involuntary muscle within eyeball
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| stereoscopic vision | 3 d vision
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| How many extrinsic muscles are there? | 6
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| Extrinsic muscles | Voluntary muscles attached to outer surface of eyeball
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| extrinsic muscle functions | pull on eyeball, convergence for 3-D vision
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| Convergence | Both eyes center on one visual field
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| The receptor cells of Retina | rods and cones
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| where is optic nerve located? | At the eyes posterior
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| How is the optic nerve formed? | Nerve impulses from rods and cones flow to sensory neurons and merge
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| Rhodopsin | Rod pigmant. Visual purple Night vision (vitamin A)
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| macula Lutea | Fovea contained here. Yellow spot in eye.
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| Fovea Centralis | Point of sharpest vision. Tiny depressed area near optic nerve. CONES LOCALIZED HERE
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| Cones function in... | Bright light. 6 million in each retina
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| Rods function in.... | Dim light. 120 million in each retina
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| vitreous Body | Fills entire space behind lens. Maintaining shape of eyeball and aids in refraction. Soft jelly like
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| Lens | Important in light refraction for near and far vision
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| Aqueous Humor | Watery fluid. fills eyeball in front of lens.
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| Cornea | forward continuation of the sclera . Transparent, colorless. Main refracting structure of the eye. The window.
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| Refraction | The bending of light rays.
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| Rods and cones are found in this layer of the eye | The retina
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| Retina (eyes actual receptor layer) | INNERMOST TUNIC OF EYE
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| opthalmoscope | used to visualize the blood vessels of the eye
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| fundis | posterior of the eye
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| Choroid | second tunic of the eye.(middle) prevents light from scattering and reflecting off eyes. contains BROWN TISSUE. SUPPLIES BLOOD VESSELS. inner surface
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| Sclera | Outer most tunic of eye (white of eye)
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| Tunics | Coats of the eye
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| Conjunctiva | Thin membrane lines inner eye lids and covers sclera
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| Lacrimal glands | secretes tears. Lubricate, protect eye
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| Nasolacrimal duct | Tears from lacrimal gland draininto nose by way of this duct
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| Motor impulses carried to the eyeball by... | Nerves
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| Abducens Nerve | Nerve VI. Supplies lateral rectus EXTRINSIC MUSCLE
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| Trochlear Nerve | Nerve IV. Supplies superior oblique EXTRINSIC MUSCLE
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| Oculomotor Nerve | Nerve III. Largest nerve. supplies voluntary and involuntary motor impulses to all but two muscles.
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| conjuntival sac | give eye drops here
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| Rods pigmant | shades of gray.
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| Rods produce what type of images? | Blurred
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| Rods ability to adapt to.... | Darkness
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| Cones are sensitive to... | Color
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| Cones produce what type of image? | Sharp
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| Cones pigmants | red, green, blue
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| What are the receptors of the retina? | Rods and cones
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| Two types of muscle of Iris | Circular and radial
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| Circular muscle | constrics
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| radial muscle | dialates
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| presbyopia | old eye.
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| Ophthalmic branch of trigeminal nerve | Cranial nerve V. pain touch temp.
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