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