Upload
heather-melina-freeman
View
219
Download
0
Tags:
Embed Size (px)
Citation preview
DISEASES AND DISORDERS DISEASES AND DISORDERS OF THE SPECIAL SENSESOF THE SPECIAL SENSES
PresbyopiaPresbyopia
Lens loses Lens loses ability to ability to change shapechange shape
Usually Usually caused by agecaused by age
Myopia (near sighted)Myopia (near sighted) Caused by eye Caused by eye shape being too shape being too longlong
Causes light to Causes light to focus in front focus in front of retinaof retina
Corrected with Corrected with glasses or glasses or contactscontacts
Hyperopia (far-Hyperopia (far-sighted)sighted)
Caused by eye Caused by eye shape being shape being shorter than shorter than normalnormal
Causes light to Causes light to focus behind the focus behind the retinaretina
Corrected with Corrected with glasses or glasses or contactscontacts
AstigmatisimAstigmatisim
Caused by corneal malformation Caused by corneal malformation Creates a distorted image on Creates a distorted image on the retinathe retina
CataractsCataracts
Caused by Caused by clouding of clouding of the lensthe lens
Can be Can be replaced replaced with with artificial artificial lenslens
Cataract
ConjunctivitisConjunctivitis Caused by an Caused by an infection of infection of the the conjunctivaconjunctiva
More commonly More commonly called called ““pink pink eyeeye””
ConjunctivitisConjunctivitis
GlaucomaGlaucoma
Aqueous humor Aqueous humor build up puts build up puts pressure on pressure on the retinathe retina
Can damage Can damage retina if not retina if not treatedtreated
Macular DegenerationMacular Degeneration
Occurs in Occurs in section of the section of the retina called retina called the maculathe macula
damaged causing damaged causing a dark area a dark area that progresses that progresses over timeover time
Macular Degeneration
StrabismusStrabismus Caused by weak eye Caused by weak eye musclesmuscles
Sometimes referred Sometimes referred to as crossed eyesto as crossed eyes
Can be surgically Can be surgically corrected or by corrected or by patching the good patching the good eye to encourage eye to encourage other eye to work other eye to work properlyproperly
DeafnessDeafness Two types:Two types: ConductiveConductive: : caused by caused by blockages in the blockages in the auditory canalauditory canal
Can be blocked Can be blocked with ear waxwith ear wax
Can be caused by Can be caused by middle ear middle ear infections orinfections or
Eardrum damageEardrum damage
Sensorineural deafnessSensorineural deafness Sensorineural:Sensorineural: Damage to Damage to auditory nervesauditory nerves
Cochlear Cochlear malformation or malformation or damaged by damaged by infectioninfection
Brain damage in Brain damage in temporal lobetemporal lobe
Cochlear Implants
Middle Ear InfectionMiddle Ear Infection
Usually involves Usually involves the eardrum being the eardrum being infected by infected by bacteria or virusbacteria or virus
Bacterial treated Bacterial treated with antibioticswith antibiotics
Common in Common in childrenchildren
Called Otis MediaCalled Otis Media
TinnitusTinnitus
Caused by Caused by improper improper discharge of discharge of electrical electrical impulses of impulses of the Organs of the Organs of Corti Hair Corti Hair cellscells
VertigoVertigo
Caused by otoliths Caused by otoliths improperly improperly aligning with aligning with membranesmembranes
May also be caused May also be caused by middle ear by middle ear infection moving infection moving into inner earinto inner ear
Causes dizziness Causes dizziness and nauseaand nausea
THE END!