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A&P Eye and Ear Worksheet (MA Fall 2014)

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
List the three layers of the eye   Sclera, Cornea, Choroid  
State briefly the function and location of the sclera   outermost layer, tough, fibrous protects, support, gives eye it's characteristic shape  
State briefly the function and location of the cornea   first structure that light travels through, assists in accommodation (focus)transparent central structure  
State briefly the function and location of the iris   circular muscle, regulates amount of light  
State briefly the function and location of the choroid   blood vessels supply nutrients to structures and carry waste from structures, middle layer at periphery  
State briefly the function and location of the retina   specialized cells sensitive to light, creates chemical impulse, color, located innermost layer at periphery  
State briefly the function and location of the optic nerve   carries electrical impulse to back of brain (occipital lobe)  
Which structure gives us the most acute vision (especially color)?   Fovea Centralis  
Name for the opening in the center of the iris   pupil  
State pupil size in presence of dim light   dilated/large  
State pupil size in presence of bright light   small/constricted  
State name of thin membrane (film) which covers eyeball and protects it.   conjunctiva  
State function of the lacrimal gland   produces tears  
Describe the location of the Anterior Cavity   from cornea to lens, 2 chambers  
Describe the location of the Anterior Chamber   from cornea to iris  
Describe the location of the Posterior Chamber   iris to lens  
Describe the location of the Posterior Cavity   from lens to optic nerve, filled with vitreous humor, optic disk, retina, macula lutea, fovea  
State functions of lens   accommodation/ focusing  
State location and function of Canal of Schlemm   Anterior cavity, drain aqueous humor, merges into optic nerve  
Trace the pathway of light traveling into the eye   cornea,aqueous humor, pupil, lens, vitreous humor, retina , optic nerve, occipital lobe of the brain  
State the area of the brain in which vision occurs   occipital lobe  
State the meaning of Blephar   eyelid  
State the meaning of Ambly   dimness  
State the meaning of Presby   aging  
In which disease is choriodal hemorrhage so common?   Diabetic reitonopathy  
What does Choriodal hemorrhage cause?   Spotty blindness  
What is the treatment for Choroidal hemmorhage?   laser treatment  
Describe a cataract   Opacity of the lens  
What are the early signs of a cataract?   Difficulty driving at night  
What is the treatment for cataracts?   lens replacement  
Breifly describe macular degeneration   cones of macula become sclerosed , shrink and die  
What is a symptom of macular degeneration   wavy lines in central vision  
What is the treatment for macular degeneration   steroids stop the degeneration  
Briefly define papilledema   Swelling or accumulation in brain,putting pressure at the optic nerve  
What is the symptom of papilledema   sweeling at optic nerve causes blindness  
What are some causes of papilledema   closed head injury  
What is the treatment for papilledema   Craniotomy- drill hole and drain fluid  
Give brief definition of amblyopia   dimness of vision  
Give brief definition of presbyopia   loss of visual acuity due to aging  
Define glaucoma   Increase in IOP (more than 20)  
State 2-3 symptoms of glaucoma   peripheral damage, keyhole vision cloudy, not blurry  
State instrument used to detect glaucoma   Tonometer  
Describe myopia   near sigtedness (can't see far)  
Describe hyperopia   far sightedness (can't see near)  
What causes hyperopia and myopia   error of refraction due to eyeball shaped incorrectly  
Define astigmatism   abnormal curvature of cornea  
Define Nyctalopia   night blindness  
Define Strabismus   Optic access of the two eyes fails to fall on the same object  


   






 
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