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Central Retinal Artery Occlusion

Annabel Wall
Quiz by Annabel Wall, updated more than 1 year ago
Annabel Wall
Created by Annabel Wall almost 3 years ago
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Description

Optometry Quiz on Central Retinal Artery Occlusion, created by Annabel Wall on 03/15/2018.

Resource summary

Question 1

Question
What artery supplies the inner retina, outer retina, ONH?
Answer
  • choroid, CRA, PCA
  • CRA, choroid, posterior Ciliary arteries
  • PCA, CRA, PCA

Question 2

Question
When cones are disrupted, what will be affected? - [blank_start]see high detail[blank_end] - [blank_start]central vision[blank_end] - [blank_start]colour vision[blank_end]
Answer
  • see high detail
  • central vision
  • colour vision

Question 3

Question
If Rods are affected - [blank_start]can't see in low light levels (at night[blank_end])
Answer
  • can't see in low light levels (at night

Question 4

Question
If Macular function is affected - [blank_start]reduced VA[blank_end] - [blank_start]colour problems[blank_end] - [blank_start]distortion (swelling)[blank_end]
Answer
  • reduced VA
  • colour problems
  • distortion (swelling)

Question 5

Question
What questions should you ask someone who complains of a 'loss of vision' - [blank_start]When did you first notice?[blank_end] - [blank_start]Is it constant or intermittent?[blank_end] - [blank_start]Whole vision or just parts of it?[blank_end] - [blank_start]Was the onset sudden or gradual?[blank_end] - [blank_start]Are there any associated symptoms?[blank_end]
Answer
  • When did you first notice?
  • Is it constant or intermittent?
  • Whole vision or just parts of it?
  • Was the onset sudden or gradual?
  • Are there any associated symptoms?

Question 6

Question
Is this a CRA occlusion?
Image:
Image
Answer
  • True
  • False

Question 7

Question
Features of a CRA are: - [blank_start]Pale white retina[blank_end] - [blank_start]can't see all the blood vessels[blank_end] - [blank_start]oedema[blank_end] - [blank_start]painless[blank_end] - [blank_start]cherry red spot at the macula[blank_end] - [blank_start]pupil doesn't constrict (RAPD)[blank_end]
Answer
  • Pale white retina
  • can't see all the blood vessels
  • oedema
  • painless
  • cherry red spot at the macula
  • pupil doesn't constrict (RAPD)

Question 8

Question
What is this? - CRA occlusion [blank_start]with cilioretinal artery sparing[blank_end] What has caused the occlusion? - [blank_start]emboli in Superior and inferior blood ve[blank_end]ssels
Image:
Picture1
Answer
  • with cilioretinal artery sparing
  • emboli in Superior and inferior blood ve

Question 9

Question
What is this? - [blank_start]Branch retinal artery occlusion[blank_end]
Image:
Picture2
Answer
  • Branch retinal artery occlusion

Question 10

Question
What is not a RAO type?
Answer
  • CRAO
  • Branch RAO
  • Cilioretinal artery occlusion
  • central vein occlusion

Question 11

Question
What are the signs and symptoms of CRAO
Answer
  • sudden painless loss of vision
  • <6/60
  • RAPD
  • retinal oedema
  • Cherry red spot at macula
  • arteriole narrowing/attenuation
  • 'cattle trucking' of blood

Question 12

Question
What are the signs and symptoms of BRAO?
Answer
  • VA variable
  • No change in VA
  • RAPD severe
  • RAPD mild or absent
  • Retinal oedema
  • arteriolar narrowing
  • no changes except slightly pale
  • most likely cause emboli

Question 13

Question
The causes of RAO are [blank_start]embolism and vaso-obliteration[blank_end]
Answer
  • embolism and vaso-obliteration

Question 14

Question
Emboli can come from
Answer
  • calcium
  • vegetations
  • thrombus
  • myxoma
  • heart (bits of valve breaks off)

Question 15

Question
[blank_start]Cholestrol[blank_end] and [blank_start]Fibrinoplatelet[blank_end] are 2 causes of atheromatous plaques
Answer
  • Fibrinoplatelet
  • Cholestrol

Question 16

Question
If you see a yellow dot in a blood vessel, what should you do?
Answer
  • Leave it, it will be pushed out soon
  • Refer to GP

Question 17

Question
Cholesterol Emboli - how many? - [blank_start]multiple[blank_end] - appearance? - [blank_start]bright refractile crystals[blank_end] - location? - [blank_start]arteriolar bifurcations[blank_end] - affect? - [blank_start]frequently asymptomatic[blank_end]
Answer
  • multiple
  • bright refractile crystals
  • arteriolar bifurcations
  • frequently asymptomatic

Question 18

Question
Calcific Emboli - how many? - [blank_start]single[blank_end] - appearance? - [blank_start]white[blank_end] - location? - [blank_start]close to disc[blank_end] - affect? - [blank_start]can cause permanent obstruction[blank_end]
Answer
  • single
  • white
  • close to disc
  • can cause permanent obstruction

Question 19

Question
Fibrinoplatelet emboli How many - [blank_start]mutiple[blank_end] appearance - [blank_start]dull grey particles[blank_end] effect - result in amaurosis fugax, [blank_start]occasionally permanent obstruction[blank_end] , [blank_start]transient loss of vision[blank_end]
Answer
  • mutiple
  • dull grey particles
  • occasionally permanent obstruction
  • transient loss of vision

Question 20

Question
What are the management for CRAO?
Answer
  • emergency referral to eye casualty
  • ocular massage
  • rebreath through paper bag
  • Acetozolamide (CAI)
  • Topical glaucoma drops - (timolol 0.5%, apraclonidine 1.0%)
  • Hyperosmotic agents (mannitol, glycerol)
  • anterior chamber paracentesis

Question 21

Question
What are the treatment for carotid disease - [blank_start]Antiplatelet therapy[blank_end] - [blank_start]Anticoagulants[blank_end] - [blank_start]Carotid Endarterectomy[blank_end]
Answer
  • Antiplatelet therapy
  • Anticoagulants
  • Carotid Endarterectomy

Question 22

Question
Rubeosis Iridis is sign of ischemia and can cause glaucoma. Also only 10% get them
Answer
  • True
  • False

Question 23

Question
Why would you still refer even if the occlusion is over 48 hours?
Answer
  • Rubeosis Iridis
  • Glaucoma
  • Stroke
  • loss of vision

Question 24

Question
What are the signs of an old CRAO? - [blank_start]RAPD[blank_end] - [blank_start]Arterioles thread like and thin[blank_end] - [blank_start]Optic atrophy[blank_end]
Answer
  • RAPD
  • Arterioles thread like and thin
  • Optic atrophy

Question 25

Question
GIANT CELL ARTERITIS (temporal arteritis) - who gets it? [blank_start]Elderly over 60[blank_end] symptoms? [blank_start]flu like[blank_end], [blank_start]HA[blank_end], [blank_start]fever[blank_end], [blank_start]weight loss[blank_end], [blank_start]general malaise[blank_end], [blank_start]depression[blank_end], [blank_start]pain on chewing[blank_end] (jaw claudication), [blank_start]tender scalp[blank_end], management - [blank_start]emergency referral[blank_end], [blank_start]anti inflammatory drugs[blank_end]
Answer
  • Elderly over 60
  • flu like
  • HA
  • fever
  • weight loss
  • general malaise
  • depression
  • pain on chewing
  • tender scalp
  • emergency referral
  • anti inflammatory drugs
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