Diseases And Disorders Of The Eye And Ear

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Diseases And Disorders Of The Eye And Ear


 
  
Created Feb 22, 2011
by
p1x3l

 

 
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1
Functioning Organs of Vision
 
eye and ear
2
Functional Process of the Eye
 
(1)an image is formed on the retina; (2)the rods and cones are stimulated; (3)nerve impulses...
3
Eyeball
 
composed of the sclera, the choroid, and the retina, and is connected to the brain by optic...
4
Sclera
 
external production
5
Cornea
 
light refraction
6
Choroid
 
middle layer of the tissue
7
Ciliary Body
 
secretion of vitreous fluid
8
Iris
 
color portion
9
Retina
 
back of eye, responsible for night vision
10
Rods
 
means of distinguishing light from dark, and perceiving shape and movement
11
Cones
 
color vision
12
Conjunctiva
 
pink area under eyelid
13
Anterior Chambers
 
space between the iris
14
Aqueous Humor
 
the fluid occupying both the anterior and posterior chambers
15
Vitreous Humar
 
jellylike fluid; it maintains the globular shape of the eyeball and facilitates the refractions...
16
Internal lens of the eye
 
is elastic and therefore can focus images whether viewed close or at a distance
17
Key to sight
 
light ray
18
Extrinsic muscle
 
each eye has six extrinsic muscles that control the movements of the eye; these muscles pull...
19
Symptoms and signs of eye disorders
 
some eye disorders are signs of systemic diseases, such as hypertension, diabetes mellitus,...
20
Opthamologist
 
study every aspect of your eye
21
Tests to identify eye disorders
 
eye charts, visual field tests, tonometry, eye cultures, dilation, electronystamography (ENG),...
22
Refractive disorders
 
being unable to focus light effectively
23
Hyperopia (Farsightedness)
 
occurs when light that enters the eye is focused behind the retina rather than on the retina
24
Myopia (Nearsightedness)
 
the result of light rays entering the eye being focused in front of the retina, causing vision...
25
Astigmatism
 
an irregular focusing of the light rays entering the eye
26
Presbyopia
 
the inability of the internal lens of the eye to focus and then refocus quickly to accommodate...
27
Nystagmus
 
involuntary eye movement
28
Strabismus (cross eyed, lazy eye)
 
a visual defect of misalignment; failure of eyes to look in same direction
29
Hordeolum (sty)
 
inflammatory infections of the sebaceous glands of the eye lids
30
Hordeolum (sty) ETIOLOGY
 
often a result of a staphylococcal infection and can be associated with and secondary to blepharitis 
31
Keratitis
 
inflammation of cornea
32
Keratitis ETIOLOGY
 
herpes, bacteria/fungi, contact lens wear, dry air, intense light
33
Blepharitis
 
inflammation of the eyelids involving hair follicles and glands
34
Blepharitis ETIOLOGY
 
the ulcerative form -staphyloccoal infection. nonulcerative-allergies
35
Entropian
 
eyelid margin go inward
36
Ectropian
 
eyelid margin go outward
37
Blepharoptosis
 
drooping of the upper eyelid
38
Conjunctivitis
 
inflammation of the conjunctiva
39
Conjunctivitis ETIOLOGY
 
allergies, chemicals
40
Cataract
 
when the natural lens of the eye becomes opacified
41
Cataract SYMPTOMS AND SIGNS
 
deterioration of vision
42
Cataract ETIOLOGY
 
aging process, congenital, ocular trauma, drug toxicity, systematic disease
43
Glaucoma
 
damage to the optic nerve
44
Glaucoma RESULTS
 
blindness
45
Diabetic Retinopathy
 
disorder of the retinal blood vessels
46
Diabetic Retinopathy SYMPTOMS AND SIGNS
 
micro aneurysm, hemorrhages, dilation of retinal veins, formation of abnormal new vessels
47
Diabetic Retinopathy ETIOLOGY
 
usually occurs 8 to 10 years after diagnosis of diabetes
48
Cancer of the eye
 
may involve the globe, the orbit, the optic nerve, or the eyelids
49
Functioning organs of hearing
 
the outer, the middle, the inner
50
Organ of hearing and balance 
 
labyrinth
51
Outer section Parts
 
external ear (pinna or auricle), external auditory canal
52
Outer section Function
 
to collect sound waves, or vibrations, from the air or environment and channel them to tympanic...
53
Middle section Parts
 
ear drum, 3 little bones (malleus, incus, stapes)
54
Middle section Function
 
receives the sound waves from the vibrating ear drum and relays them along the three bones...
55
Inner section Parts
 
cochlea and the labyrinth
56
Inner section Function
 
responsible for maintaining balance
57
Common signs and symptoms of ear disorders
 
hearing loss, ear pain or pressure, tinnitus, vertigo, nausea and vomiting
58
Conductive hearing loss
 
caused by an impairment of the eardrum or bones in the middle ear
59
Sensorineural hearing loss (nerve deafness)
 
results from impairment of the cochlea or auditory nerve
60
Impacted cerumen
 
atypical accumulation of cerumen in the canal of the outer ear. (ear-wax buildup)
61
Infective otitis externa
 
inflammation of the external ear canal 
62
Infective otitis externa HOW DIAGNOSED
 
an otologic examination and a symptoms confirm the diagnosis 
63
Swimmer's ear
 
inflammation and resulting infection of the outer ear canal after water has been entrapped...
64
Swimmer's ear SYMPTOMS AND SIGNS
 
severe pain, red swollen ear canal, hearing loss, fever, pruritis
65
Otitis media
 
inflammation of the normally air filled ear with the accumulation of the fluid behind the tympanic...
66
Otitis media SYMPTOMS AND SIGNS
 
With serious Otitis media, the only symptoms may be a feeling of fullness or pressure and some...
67
Otitis media ETIOLOGY
 
can be acute or chronic. with acute, the cause is usually a virus from a URI that has spread...
68
Otitis media HOW DIAGNOSED
 
Otoscopy
69
Otitis media TREATMENT
 
Myringotomy (surgical evaluation of the fluid)
70
Meniere's Disease
 
a chronic disease of the inner ear that affects the labyrinth
71
Meniere's disease AGE AFFECTED
 
between 40 and 50
72
Benigh Paroxysmal Positional Vertigo
 
usually a vestibilar system disorder
73
Benigh Paroxysmal Positional Vertigo SYMPTOMS AND SIGNS
 
a spinning sensation with moving of  head, nausea, vomiting, involuntary eye movement,...
74
Labrythitis
 
an inflammation or infection of the labyrinth of the inner ear
75
Labrythitis SYMPTOMS AND SIGNS
 
fever, extreme vertigo, nausea & vomiting
76
Labrythitis ETIOLOGY
 
usually the result of a virus but can be cause by a bacterial infection that has spread from...
77
Ruptured Tympanic Membrane
 
any type of tear or injury to the eardrum
78
Ruptured Tympanic Membrane ETIOLOGY
 
insertion of sharp objects into ear canal, explosion, severe middle ear infection, a blow to...
79
Mastoiditis
 
inflammation of the mastoid bone, or mastoid process
80
Mastoiditis ETIOLOGY
 
Acute mastoiditis is the result of neglected acute otitis media. Chronic mastoiditis is associated...
81
Sensorineual Hearing Loss (deafness)
 
sound waves reach the inner ear but are not perceived because the nerve impulses are not transmitted...
82
Sensorineual Hearing Loss ETIOLOGY
 
nerve failure or damage to the cochlea or the auditory nerve. Aging process, loud noise, side...
83
Sensorineual Hearing Loss PROGNOSIS
 
Sensorineual Hearing Loss that is caused by damage to the cochlea is IRREVERSIBLE.
84
Cancer of the ear
 
tumors of the ear can occur in any part of the ear and may be benign or malignant. They include...


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