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sensory eye

QuestionAnswer
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.
Created by: 100000650880670
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