Eye Pathology! Flashcards
Myopia vs hyperopia
What does this do to the eyeball?
Which is more common?
Myopia = near sighted!
- eyeball is too long
- MOST COMMON
Hyperopia = far sighted!
- eyeball is too short
Anomaly vs anopia
Role in color blindness?
Anomaly = impairment Anopia = inability
Anopia would be missing cones entirely!!
** most common is Red/green missing
Conjunctivitis
Pink eye
Keratitis
Inflammation of the cornea
Dirty water, wearing contacts too long, fungal or bacterial
Trachoma
*leading cause of preventable blindness
Bacterial infection
Eyelashes scratch the cornea
Chlamydia Trachomatis
Blepharitis
Infection of the eyelid!
Can also lead to Stye… infection of a gland in the lower eye lid
Sjögren’s syndrome
Autoimmune disease against tear glands and sweat glands!
Often need artificial tears
Cataracts
When the lends becomes opaque..
Risk factor is UV exposure
Retinal detachment!
Vitreous humor changes to more fluid and pulls away.
Treat with a gas bubble
2 types of macular degeneration!
Age related…
- Wet = more serious, neovascular, hemorrhage
- Dry = deposits drusen
Malignant Melanoma vs. Reninoblastoma
Malignant melanoma
- UV and light eyes = risk
- pigment epithelial tumor
Retinoblastoma
- during development (kids)
- leukocaria is a common sign (white pupil)
Glaucoma
2 types…
What is the normal flow of eye fluids and what is the eye fluid called?
Increased pressure can cause blindness…
Due to aqueous humor not being able to drain!
- Open angle == trabecular mesh work is no longer porous
- Closed angle == iris bends and blocks access to trabecular mesh work
Normal flow of aqueous humor is through trabecular mesh work to schlemm’s canal!
