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51 Cards in this Set
- Front
- Back
Explain the path of a tear coming out your nose when you cry.
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Lacrimal gland, lacrimal punctum, lacrimal canals, lacrimal sac, nasolacrimal duct
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What is the lacrimal Punctum?
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holes in the medial eye that lead into the lacrimal canal
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What is the Lacrimal Sac?
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Sac that collects tears and deposits them into the nasolacrimal duct
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What gets excited when we are happy or sad?
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Lacrimal Gland
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What is the clear mucus membrane that covers the white of the eye?
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Conjunctiva
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What happens when the conjunctiva becomes infected?
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Pink eye (Conjunctivitis)
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Where do contacts sit?
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Conjunctiva sac
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What are the 4 rectus muscles of the eye and what are their functions?
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Superior rectus - look superior
Lateral rectus - look left or right Medial rectus - look medially Inferior rectus - look inferiorly |
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What are the 2 oblique muscles and where are they?
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Superior obliques - most superior and looks inferior
Inferior obliques - perpendiculaire to inferior rectus and looks superior. both rotate laterally |
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What nerve does the lateral rectus innervate?
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Abducens (VI)
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What nerve doe the superior oblique innervate?
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Trochlear (IV)
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What two muscles are the only two that do no innervate the oculomotor neuron?
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Lateral rectus and superior oblique
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What are the 3 tunics of the eye? (coats) from most superficial to deep
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Fibrous, Vascular, Sensory
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What are the 2 areas of the fibrous tunic and what are their functions?
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Sclera - white of eye that shapes and protects the eye. Continuous with dura mater
Cornea - Crystal clear window of they eye that lets light him also begins the bending process of the light. Goes over color part of eye. |
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What are the areas of the vascular tunic?
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Choroid, Cilliary body, Iris, Pupil
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What controls lens shape?
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Cilliary body
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What does the choroid do?
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Big black part that contains melanin. It absorbs the light so we are trying to see 6 different things.
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What are the functions of the Iris?
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Color part of the eye and controls the pupil size to control how much light comes in.
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What is the pupil?
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hole in the eye that lets light in. Dilate when in fight or flight response
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What are the areas in the sensory tunic?
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Pigmented layer, neural layer, fovea centralis, optic nerve
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What is the single cell think layer of the retina that absorbs light and prevents it from scattering?
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Pigmented layer
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What is the neural layer
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Contains the millions of photoreceptor cells that transduce light energy.
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What is the fovea centralis
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spot on rear of the eye that is most dense of cones on the retnia
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What moves the signal from the eye to the brain?
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Optic nerve
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What are rods?
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Night vision and peripheral vision
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What are cones?
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Color and fine detail
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What are the types of photoreceptors?
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Cones and rods
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What is the most abundant type of photoreceptor?
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Rods
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What is another name for optic disc?
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Blind spot
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What is the path of vision?
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Cornea, aqueous humor, pupil, lens, vitreous humor, retina, optic nerve, occipital lobe
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Where is the image projected?
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Retina
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What are the 2 types of humor?
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Aqueous and viteous
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What liquid is between the cornia and lens and what does it do?
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Aqueous humor - continuously trains and replenishes, nutrients and oxygen to the lens and cornea
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What liquid in in the posterior section of the eye and what does it do?
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Viteous humor - transmits light, holds retina to the rear of the eye and contributes to intraocular pressure and it is never replaced, maintains eye shape
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What is glaucoma?
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aqueous humor can no longer leave and pressure builds up between lens and cornea putting pressure on the back of the eye and destroys retina
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Spot on sensory surface where nerve leave eye, no vision there.
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Blind Spot
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Outter blood supply for sensory surface
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Choroid
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Ring of muscle that changes lens shape
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Ciliary Body
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Protective cover under eye lids
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Conjuctivia
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External focusing element of eye and transparent protective coat
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cornea
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muscles to move eye
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extra ocular eye muscles
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focal point of vision
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fovea
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diaphragm to control light entry into eye, gives eye color
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Iris
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Produces fluid to wash external eye surface
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lacrimal gland
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Internal focusing element of eye, can change shape
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lens
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Bundle of axons that carries information to the brain.
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Optic Nerve
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Hole in diaphragm for light entry
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Pupil
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Layer of sensory cells
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neural layer of retina
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non transparent outer protective coat of eye
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sclera
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Ligaments connecting internal focusing element to muscles allowing shape change
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suspensory ligaments
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what lobe of the brain is visual information carried to?
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occipital
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