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Opthalmology > Red Eye > Flashcards

Red Eye Flashcards

1
Q

What are causes of subconjunctival haemorrhage?

A
  • Trauma
  • Spontaneous
  • Haemorrhagic disorders
  • Valsalva pressure spikes
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2
Q

What investigation might you consider doing in somoene with a subconjunctival haemorrhage?

A

BP check

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3
Q

What is episcleritis?

A

A benign, self-limiting inflammatory disease affecting part of the eye called the episclera. The episclera is a thin layer of tissue that lies between the conjunctiva and the connective tissue layer that forms the white of the eye (sclera)

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4
Q

What causes episcleritis?

A

No cause in 70%, but can be:

  • Rheumatic fever
  • SLE
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5
Q

What are features of episcleritis?

A
  • Pain
  • Discomfort
  • Sectoral redness
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6
Q

How would you manage someone with episcleritis?

A
  • Systemic/topical NSAIDs
  • Topical Steroids
  • Lubricants
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7
Q

What is scleritis?

A

“Vasculitis of the Sclera”

A serious inflammatory disease that affects the white outer coating of the eye, known as the sclera

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8
Q

What are causes of scleritis?

A
  • Autoimmune conditions (Wegener’s, polyangitis)
  • Infections
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9
Q

What are symptoms of scleritis?

A
  • Severe Pain
  • Redness
  • Photophobia
  • Decreased vision
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10
Q

What are signs of scleritis?

A
  • Generalised inflammation
  • Conjunctival oedema
  • Scleral thinning
  • Decreased visual acuity
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11
Q

What tests might you consider doing in someone presenting with scleritis?

A

Check for autoimmune disorder

  • ESR
  • ANCA
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12
Q

How would you manage someone with scleritis?

A

Refer to a specialist

  • Oral steroids
  • Immunosuppression
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13
Q

What is the following?

A

Corneal foreign body

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14
Q

How would you manage a corneal foreign body?

A
  • Remove foreign body under magnification - Cotton bud or needle
  • Remove rust ring
  • Treat corneal abrasion
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15
Q

What is the following?

A

Rust ring

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16
Q

What is a corneal abrasion?

A

Breach in the epithelium of the eye - occurs without keratitis

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17
Q

What is keratitis?

A

Inflammation of the cornea - marked by white area on the cornea, indicating a collection of white cells on the corneal tissue

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18
Q

What is important to do when examining someones eyes for a corneal foreign body?

A

Invert the upper lid to look for additional FBs

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19
Q

What clinical features would point towards a corneal abrasion?

A
  • Pain
  • Watering
  • Photophobia
  • Conjunctival injection
  • Swollen lids
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20
Q

How would you investigate for a corneal abrasion?

A

Stain with flourescin and bright blue light (shone tangentially across the globe)

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21
Q

How would you manage a corneal abrasion?

A
  • Look for conjunctival foreign bodies +Evert eye lid
  • Topical antibiotics - chloramphenicol
  • Cycloplegics
  • Pressure pad and patch
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22
Q

When would you not use a pressure pad and patch in someone with a corneal abrasion?

A

If there is suspected infection

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23
Q

What is a corneal ulcer?

A

Also known as ulcerative keratitis - an inflammatory, or more seriously, infective condition of the cornea involving disruption of its epithelial layer with involvement of the corneal stroma.

Image - corneal ulcer with hypopyon

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24
Q

What organisms cause of corneal ulcers?

A
  • Bacteria
  • Herpes viruses
  • Fungi - candidia, aspergillus
  • Acanthoemeba
  • Vasculitis - RA,
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25
Q

How would you manage a corneal ulcer?

A
  • Bacterial - do not patch
  • Topical steroids
  • Refer to opthalmologist
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26
Q

What are symptoms of a corneal ulcer?

A
  • Pain
  • Redness
  • Photophobia
  • Watery
  • Discharge
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27
Q

What are features of viral keratitis?

A
  • Discomfort
  • Foreign Body sensation
  • Watering
  • Photophobia
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28
Q

What is viral keratitis most commonly caused by?

A

Herpes simplex/zoster

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29
Q

What are signs of viral keratitis?

A
  • Epithelial dendrites
  • Stromal keratitis
  • Central ulceration
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30
Q

How would you manage viral keratitis?

A
  • Aciclovir (3%) 5x per day, for 3 weeks
  • Topical cycloplegics
  • May need topical steroids
  • Refer to opthalmologist
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31
Q

What is uveitis?

A

Inflammation of the uvea, the pigmented layer that lies between the inner retina and the outer fibrous layer composed of the sclera and cornea. The uvea consists of the middle layer of pigmented vascular structures of the eye and includes the iris, ciliary body, and choroid.

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32
Q

What are the different types of uveitis?

A
  • Anterior uveitis
  • Intermediate uveitis
  • Posterior uveitis
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33
Q

What are symptoms of anterior uveitis?

A
  • Pain
  • Blurred vision
  • Photophobia
  • Redness
  • Watering
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34
Q

What conditions is uveitis associated with?

A
  • Positive HLA-B27 - Ankylosing spondylitis
  • Arthritis
  • Inflammatory bowel disease
  • Sarcoid
  • Tuberculosis
  • Syphilis
  • Toxoplasmosis
  • Behçet’s syndrome
  • Lymphoma
  • Viruses - herpes, CMV and HIV infection
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35
Q

What are signs of anterior uveitis?

A
  • Circumcorneal redness - ciliary flush
  • Keratic precipitates on corneal epithelium
  • Cells/flare in anterior chamber
  • Miosis - due to sphincter spasm
  • Hypopyon
  • Posterior/Peripheral anterior Synechaie/Festooned pupil
  • Iris atrophy
  • Fibrinous membrane in the pupillary
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36
Q

How would you manage anterior uveitis?

A
  • Topical steroids
  • Cycloplegics
  • Topical anti-glaucoma meds - if raised IOP
  • Steroid ointment - for night
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37
Q

What are cycloplegics?

A

Used to paralys the ciliary muscle of the eye, resulting in a loss of accommodation. Because of the paralysis of the ciliary muscle, the curvature of the lens can no longer be adjusted to focus on nearby objects.

Often used to prevent synechiae, and reduce pain from ciliary muscle spasm

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38
Q

Which type of uveitis is photophobia and pain most commonly associated with?

A

Anterior uveitis

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39
Q

What type of uveitis are floaters associated with?

A

Posterior uveitis

40
Q

What factors contribute to the recurrence of herpes keratitis?

A
  • Ultraviolet light
  • Stress
  • Menstruation
41
Q

What parts of the eye are affected in anterior uveitis?

A

Iris with or without ciliary body inflamed

42
Q

What parts of the eye are affected in intermediate uveitis?

A

Ciliary body inflamed - leaks proteins and cells

43
Q

What parts of the eye are affected in posterior uveitis?

A

Choroid

44
Q

What is the pathophysiology of uveitis?

A

Inflammation of the uveal tract, which includes the iris, ciliary body and choroid. Inflammation causes plasma and WBCs to leak into the aqueous humour

  • Hazy anterior chamber
  • Cells depositied at the back of the cornea
  • Cell in AC may settle inferiorly - hypopyon
45
Q

What is the pathophysiology of acute closure glaucoma?

A

Aqueous humour produced by ciliary bodies enters the anterior chamber via the pupil. This drains via the trabecular network at the angle to enter Schlemm’s Canal.

In acute angle closure glaucoma, the iris obstructs the trabecular meshwork, obstructing the drainage of aqueous humour.

46
Q

What can untreated increased Intraocular pressure lead to?

A

Optic nerve damage and permanent visual field loss

47
Q

What is the normal intraocular pressure of the eye?

A

10-21 mmHg

48
Q

What are glaucomas?

A

Group of diseases in which the pressure inside the eye is sufficiently elevated to cause optic nerve damage and result in visual field defects

49
Q

What can IOP rise to in acute angle closure glaucoma?

A

>50mmHg

50
Q

Who are those most at risk of acute angle closure glaucoma?

A
  • Hypermetropes
  • Women
51
Q

When is acute angle glaucoma most likely to occur?

A

When pupil is dilated - e.g. low level light/while sleeping

52
Q

Which sex does acute angle glaucoma most commonly occur in?

A

Women

53
Q

What are symptoms of acute angle closure glaucoma?

A
  • Red eye - painful
  • Blurred vision
  • Unwell with nausea and vomiting
  • Headache
  • Tender, hard eye
  • Semi-dilated pupil
54
Q

What are signs of acute closure glaucoma?

A
  • Hard Eye
  • Vision - counts finger -> hand motion visible
  • Circumcorneal congestion
  • Corneal oedema
  • Shallow anterior chamber
  • Semidilated pupil
  • IOP - 40-70 mmHg
55
Q

How would you manage someone with acute angle closure glaucoma?

A

Reduce IOP

  • G. Timilol (0.5%)
  • G. Pilocarpine (1%) - every 10 mins x3
  • IV acetozolamide 500mg stat
  • IV Mannitol - 20%, 250-500 ml over 30-45 mins
  • Oral glycerol
56
Q

Describe the following features of Anertior Uveitis:

  • Pain
  • Redness
  • Discharge
  • Vision
  • Photophobia
  • Pupil
A
  • Pain - mild/moderate
  • Redness - pericorneal/none
  • Discharge - minimal/none
  • Vision - blurred
  • Photophobia - ++
  • Pupil - Constricted
57
Q

Describe the following features of bacterial conjunctivitis:

  • Pain
  • Redness
  • Discharge
  • Vision
  • Photophobia
A
  • Pain - itching/gritty
  • Redness - peripheral/diffuse
  • Discharge - yellow
  • Vision - normal
  • Photophobia - +
58
Q

Describe the following features of viral conjunctivitis:

  • Pain
  • Redness
  • Discharge
  • Vision
  • Photophobia
A
  • Pain - itching/gritty
  • Redness - peripheral/diffuse
  • Discharge - watery
  • Vision - normal
  • Photophobia - +
59
Q

Describe the following features of scleritis:

  • Pain
  • Redness
  • Discharge
  • Vision
A
  • Pain - severe/boring
  • Redness - sectoral/diffuse
  • Discharge - none
  • Vision - normal
61
Q

Describe the following features of acute angle glaucoma:

  • Pain
  • Redness
  • Discharge
  • Vision
  • Photophobia
  • Pupil size
A
  • Pain - severe, often accompanied by headache
  • Redness - pericorneal
  • Discharge - yes/no
  • Vision - lost
  • Photophobia - none
  • Pupil size - Dilated
62
Q

Describe the following features of keratitis/corneal ulcer:

  • Pain
  • Redness
  • Discharge
  • Vision
A
  • Pain - severe, particularly on eye closing
  • Redness - pericorneal
  • Discharge - yes/no
  • Vision - lost
63
Q

Describe the following features of orbital cellulitis:

  • Pain
  • Redness
  • Discharge
  • Vision
A
  • Pain - severe periocular pain
  • Redness - none
  • Discharge - yes/no
  • Vision -normal
64
Q

What is the differential diagnosis for Red eye?

A
  • Trauma
  • Foreign body
  • Acute glaucoma
  • Keratitis/Corneal ulcer
  • Conjunctivitis
  • Scleritis/Episcleritis
  • Orbital cellulitis
  • Anterior uveitis
  • Spontaneous conjunctival haemorrhage
65
Q

What are red flag features of red eye on history and examination?

A
  • Severe pain
  • Photophobia
  • Reduced vision, particularly if sudden
  • Coloured halos around point of light in a patient’s vision
  • Proptosis
  • Smaller pupil in affected eye
66
Q

What are red flag features of red eye on medical assessment?

A
  • High intraocular pressure
  • Corneal epithelial disruption
  • Shallow anterior chamber depth
  • Ciliary flush
67
Q

What are common causes of keratitis?

A
  • Herpes
  • Contact lenses
  • Blepharitis
68
Q

What is the following?

A

Bacterial conjunctivitis - purulent discharge

69
Q

What is the following?

A

Conjunctivits - Most likely viral as no purulent discharge

70
Q

What is the most common cause of viral conjunctivitis?

A

Adenovirus

71
Q

What might precipitate a viral conjunctivitis?

A

URTI

72
Q

What is conjunctival injection?

A

Engorged conjunctival vessels

73
Q

What are symptoms of bacterial conjunctivitis?

A

Ususally only 1 eye, but can spread

  • Discomfort
  • Purulent discharge - eye may be difficult to open in the morning
74
Q

What are signs of bacterial conjunctivitis?

A
  • Mucopurulent discharge
  • Normal vision - after discharge has been blinked clear
  • Uniform engorgement of all the conjunctival blood vessels
75
Q

How would you manage a bacterial conjunctivitis?

A
  • Topical antibiotic eye drops - chloramphenicol
    • Every 2 hours for first 24 hrs, then decreasing to 4x per day for 1 week.
  • Chloramphenicol ointment - at night
  • Advised about general hygiene - e.g. not sharing face towels.
76
Q

What are symptoms of viral conjunctivitis?

A

Normally both eyes

  • Gritty and uncomfortable
  • Associated symptoms of a cold and a cough.
  • Watery discharge
  • Photophobia - if they develop discrete corneal opacities.
77
Q

What are signs of viral conjunctivitis?

A

Both eyes

  • Red with diffuse conjunctival injection
  • Clear diacharge
  • Small white lymphoid conjunctival aggregations
  • May be head and neck lymphadenopathy
78
Q

How would you manage viral conjunctivitis?

A

Usually self limiting - Warn that may take a few weeks

  • Consider Chloramphenicol - provide symptomatic relief and help prevent secondary bacterial infection.
  • Strict hygiene measures - very contagious
  • Chronic infection - steroid eye drops may be indicated, under opthalmology supervision
79
Q

What are symptoms of allergic conjunctivitis?

A

Both eyes

  • Itching
  • Clear discharge
  • History of atopy - similar may have occured in previous seasons
80
Q

What are signs of allergic conjunctivitis?

A
  • Diffusely injected conjunctivae
  • Chemosis
  • Clear and stringy dsicharge
  • Papillae - round oedoematous swelling in the eyelid caused by fibrous septa that tether the eyelid
81
Q

How would you manage allergic conjunctivitis?

A
  • Topical/oral antihistamine
  • Vasoconstrictor eye
  • Steroids - with opthalmology supervision
82
Q

What is iritis?

A

Inflammation of the iris

83
Q

What is cyclitis?

A

Inflammation of the ciliary body

84
Q

What is iridocylitis?

A

Anterior uveitis

85
Q

What are signs of a corneal ulcer?

A
  • May be decreased visual acuity - depends on the location and size ulcer,
  • Discharge
    • May be a watery - due to reflex lacrimation
    • May be mucopurulent - bacterial ulcers.
  • Conjunctival injection - generalised or local
  • May be hypopyon
86
Q

What is a dentritic corneal ulcer indicative of?

A

Herpes simplex virus

87
Q

Why does photophobia occur in anteriro uveitis?

A

Inflammation coupled with ciliary muscle spasm

88
Q

What can worsen photophobia experienced in anterior uveitis?

A

When the patient is reading and contracting the ciliary muscle

89
Q

What is the diagnosis?

A

Viral conjunctivitis

90
Q

What is the diagnosis?

A

Bacterial conjunctivitis

91
Q

What is the diagnosis?

A

Corneal ulcer with hypopyon

92
Q

What is the diagnosis?

A

Episcleritis

93
Q

What is the diagnosis?

A

Scleritis

94
Q

What is the diagnosis?

A

Acute angle glaucoma

95
Q

What is the diagnosis?

A

Anterior uveitis

96
Q

What is the diagnosis?

A

Orbital Cellulitis

Opthalmology (12 decks)

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