Normal vs Abnormal Flashcards
What is the referral urgency for POAG?
Routine
What are the signs for POAG?
Optic disc cupping - vertical size changes, not following ISNT
Reproducible VF defect consistent with disc appearance
IOP >21mmHg
What are the symptoms for POAG?
Usually asymptomatic until significant VF loss
What are the signs of POAG at the optic disc?
Loss of ISNT rule
Asymmetrical discs >0.2
Vertical enlargement
CD >0.7 (changed since last visit or new px)
Focal narrowing or notching of NRR
Concentric/generalised atrophy
Peripapillary Atrophy (PPA)
Sharpened nasal edge
Visible lamina cribosa
Pallor
Saucerisation
Baring of circumlinear vessels
Bayonetting (vessels entering at 90 degrees)
Collaterals
Disc haem (flame-shaped at rim)
RNFL thinning
What are the risk factors for POAG?
Increasing age
Female
OHT
FH for first degree relative
Thin CCT
Myopia >4D
Diabetes
Systemic hypertension
West African or African-Caribbean ethnicity (onsets at younger age)
What are the differential diagnoses for POAG?
OHT
Tilted discs
Physiological cupping
Disc drusen
Anterior ischaemic optic neuropathy
Secondary glaucoma
Optic atrophy
Glaucomatous VF defect from another condition
What are the signs of OHT?
IOP >21mmHg with no other glaucomatous signs or sxs
What is the referral urgency for OHT?
Routine
What are the RFs for OHT?
HBP
Afro-Caribbean race
Increasing age
What are the differential diagnoses for OHT?
POAG
PACG
Secondary OAG
What is the referral urgency for NTG?
Routine
What are the signs of NTG?
IOP consistently <21mmHg
Glaucomatous VF defect
Glaucomatous optic disc
Peripheral vasospasm
What are the symptoms of NTG?
Migraines
Otherwise asymptomatic
What are the differential diagnoses for NTG?
POAG
Intermittent ACG
Secondary OAG
Ischaemic optic neuropathy
What are the RFs for NTG?
Hypotension
Thin cornea
Female
Glaucomatous discs
What is the referral urgency for Acute ACG?
Emergency (same day)
What are the signs of Acute ACG?
Dilated limbal/conjunctival vessels - hyperaemia
V high IOP (40-80mmHg)
Corneal epithelial/stromal oedema
Descemet’s folds due to oedema
Shallow or flat AC
Fixed, mid dilated, oval pupil which doesn’t react to light (RAPD present)
Iris bombe
Peripheral anterior synechiae
What are the symptoms of Acute ACG?
Reduced vision
Haloed lights
Headache
Pain
Nausea and/or vomiting
What are the risk factors for Acute ACG?
FH of AACG
Hyperopia
Chinese ethnicity
40-50 years old
Female
What are the differential diagnoses for Acute ACG?
Acute conjunctivitis
Uveitis
Keratitis
Trauma
Inflammation
Neovascular glaucoma
Secondary ACG
What is the referral urgency for optic neuritis?
Urgent
What causes optic neuritis?
Inflammatory or demyelinating disorder of the optic nerve head unilaterally
What are the symptoms of optic neuritis?
Rapid vision loss in one eye
Retro-orbital pain
Ocular pain
Visual loss worse in heat or during exercise
What are the signs of optic neuritis?
RAPD
VA loss
Central scotoma
Severely impaired colour vision
Fundus normal but blurred disc margins
Swollen veins
What are the RFs for optic neuritis?
Younger age
Female
MS
Viral infections
Tuberculosis
Syphilis
What are the differential diagnoses for optic neuritis?
Arteritic anterior ischaemic optic neuropathy
Non-arteritic anterior ischaemic optic neuropathy
Papilloedema
What is papilloedema?
Swelling of the optic nerve - inflammatory or demyelinating bilaterally
What are the mechanical signs of papilloedema?
ONH elevation
Blurred optic disc margin
Physiological cup filling in
Peripapillary RNFL oedema
Retinal and/or choroidal folds
What are the vascular signs of papilloedema?
Disc hyperaemia
Loss of spontaneous venous pulsation and venous congestion
Papillary/peripapillary haem
Hard exudates
Cotton wool spots
Enlarged blind spot on VF
Diplopia due to CN VI palsy
What is the referral urgency for papilloedema?
Urgent
What can cause papilloedema?
Brain tumours
Meningitis
Hydrocephalus
Pseudo-tumour cerebri (raised intracranial pressure with no other intracranial pathology)
What are the symptoms of papilloedema?
Severe headaches
Nausea
Explosive vomiting
Amaurosis fugax (transient blanking of vision - otherwise normal)
What are the differential diagnoses for papilloedema?
Optic disc drusen
Malignant hypertension
Pseudopapilloedema
CRVO
Anterior ischaemic optic neuropathy
Optic neuropathy
What is the referral urgency for hypertensive retinopathy?
Emergency
What are the signs of hypertensive retinopathy?
Focal arteriolar narrowing
Arteriosclerotic changes
Flame haem on nerve fibres
Cotton wool spots
Disc oedema
Macular star
What are the symptoms of hypertensive retinopathy?
Headache
Blurred vision
Altered conscious state
Palpitations
Chest pain
What are the differential diagnoses for hypertensive retinopathy?
Diabetic retinopathy (esp if less sxs)
CRVO
Radiation retinopathy
What are the signs of CRVO?
Haem in all quadrants (deep and dark) due to ishchaemia
Dilated, tortuous veins
RAPD
Multiple cotton wool spots due to ischaemia
Macular oedema
Poss rubeosis iridis (iris neovasc)
Neovasc (disc or elsewhere - NVD or NVE)
What is the referral urgency for CRVO?
Urgent
What are the symptoms of CRVO?
Sudden vision loss (<6/36)
No pain
What are the RFs for CRVO?
Smoking
Diabetes
Hypertension
Hyperlipidaemia
Hyperviscosity of blood
What are the differential diagnoses for CRVO?
POAG
BRVO
Hypertensive retinopathy
Diabetic retinopathy
What are the signs for BRVO?
Flame, dot and blot haem next to dilated and tortuous vein
Only in one area of retina, not usually crossing horizontal midline
Exudates
Occlusion at A/V crossing (arteriole anterior to vein)
What are the symptoms for BRVO?
Often asymptomatic unless affecting large area of retina or the macula
What is the referral urgency for BRVO?
Urgent
What are the RFs for BRVO?
Hypertension
Cardiovascular disease
Lipid abnormality
What are the differential diagnoses for BRVO?
CRVO
Hypertensive retinopathy
Diabetic retinopathy
What are the signs of CRAO?
VA = LP or worse
RAPD
Poss visible emboli in vessel
Narrowed vessels
Pale retina
Macula cherry red spot
Optic disc pallor (paler as NFs degenerate)
What is the referral urgency for CRAO?
Emergency
What are the symptoms of CRAO?
Severe, sudden, painless loss of vision unilaterally
Poss previous amaurosis fugax (transient loss of vision)
What are the differential diagnoses for CRAO?
Macular haem
Retinal detachment
Anterior ischaemic optic neuropathy
What are the signs of BRAO?
Areas of retinal infarction (whitening)
Narrowed vessels
(Size of affected area and likelihood of macular oedema dependant on location of occlusion)
What is the referral urgency for BRAO?
Urgent - if no macular involvement
Emergency - of foveal involvement and recent onset
What are the symptoms of BRAO?
Unilateral, no pain
Poss previous amaurosis fugax (transient loss of vision)
Loss of vision if macula involved
What are the differential diagnoses for BRAO?
Hypertensive retinopathy
Diabetic retinopathy