Slit Lamp and Other Procedures Flashcards
What can the slit lamp examine?
anterior segment anatomy
How is the anterior angle of the eye graded?
Numbered grading too?
open
narrow
closed
Grade 1= 10 degrees
Grade 2= 20
Grade 3= 30
Grade 40 = 40
What should you do before you dilate the eye?
always take a look at the angle to see if its narrow
What happens when we see cells flaring (like dust has been kicked up) in the anterior chamber?
White blood cells floating around
Is the cornea vascular?
no
How does the cornea react to water?
water tight and lipid soluable
What does the endothelium act as?
a pump (controls amount of water let in)
What happens to the stroma if there is too little or too much water?
cloudy
Why do we need to look at the palpebra?
4
- FB
- Allergy
- Viral infection
- Bacterial infection
What do the flare and cells mean?
inflammation
Iritis or Uveitis
Dilator muscle controlled by?
sympatheic
constrictor muscle controlled by
parasympatheic
What does a preauricular node rule out?
bacterial and allergic etiologies (its viral)
What controls accommodation?
ciliary body
What makes the aqueous?
ciliary processes
Where is the choroid located?
b/w sclera and retina
Whats something we can use to make treat corneal abrasion?
bandage contact lens so it can stop irritating the hangnail
What is very quick and effective screening for drugs or trauma in the eyes?
Pupils and EOMS
What are we testing with a visual field test?
function of the optic nerve and visual pathways
Whats are the structures that the nerve impulse goes to get to the brain?
5
Optic Nerve Chiasm Lateral Geniculate Body Optic Radiations Visual Cortex
Anything that affects the retina or retinal vasculature will affect what?
vision/refractive satus
5% of the retina that is your fovea(macula) is responsible for how much of your vision?
95%
What part of your anatomy is responsible for peripheral vision?
How about Central?
rods
Cones
What happens if the blood brain barrier becomes plugged?
emboli/vasculature occlusion = STROKE
In glaucoma what would happen to the cup size?
LARGE
Cupping is what?
bending of small blood vessels across the disc
Types of tonometry?
5
goldmann perkins air-puff tono-pen Keeler or Pulse air