Spot faces Flashcards
Lid retraction in TED
Dalrymple sign
Lid lag in TED
Von Graefe
Retinal Dialysis traumatic vs idiopathic location
Traumatic dialysis - superonasally
Idiopathic dialysis - inferotemporally
Antibodies for Myesthnia Gravis
Anti-AChR and Anti-MUSK
Myaesthenic crisis
Steriods
Helminth examples
Onchocerca volvulus - transmitted by Simulium blackflies
Toxocara canii causes endophthalmitis in children - host is dogs.
Fungal Keratitis
Candida
- Patients with AIDS/ immunocompromise/diabetes
- Plaque corneal ulcer with expanding infiltrate
Aspergillus/Fusarium
- History of trauma associated with contact of plants or soil
- White, feathery corneal lesions
Candida keratitis tx
Voriconazole or amphotericin B drops
Filamentous (aspergillus/fusarium) keratitis
Natamycin drops
Epithelial Dystrophies
Cogan (epithelial basement membrane)
- commonest
- map-like subepithelial opacities
Meesman (epithelial)
Diabetic Retinopathy pathology and layer
Pericyte damage → microaneurysms → flame haemorrhages (nerve fibre layer)
Infarcts → cotton wool spots (axonal debris at infarct margins) (nerve fibre layer)
Increased vessel permeability → Hard exudates (lipoproteins in outer plexiform layer)
Cystoid macular oedema (outer plexiform layer)
Neovascularization
Imaging modalities for diagnosing keratoconus
Corneal topography (Pentacam)
Ketatoconus signs
Munson sign - lower lid protrudes on downward gaze
Vogt striae - corneal stromal striations seen on slit lamp
Mitochondrial Inheritance
Kearns-Sayre syndrome
- Increased concentration of mitochondria in muscles
- Causes to myopathy, ophthalmoplegia, ptosis, salt and pepper retinopathy and cardiac conduction defects
Leber Hereditary optic neuropathy
- Ganglion cell degeneration leading to optic atrophy.
- Young men with progressive painless vision loss
- Fundoscopic triad of pseudo-oedema, telangiectasia and tortuous vessels.
Cytomegalovirus Retinitis tx
Affect AIDs patients
IV ganciclovir
Cyst of Moll vs Zeis
Moll - translucent
Zeis - non-translucent
Lens Lens Capsule collagen
4
Willebrand’s knee
Junctional scotomas
I.e Left sided lesion of Willebrand’s knee such as a tuberculum sellae meningioma, will result in loss of right superonasal field and left blind eye (junctional scotoma)
Lesions of the optic tract
contralateral incongruous (asymmetrical) homonymous hemianopia.
+ RAPD
Most common cause of blindness in the world
Cataract
Most common cause infective blindness in the world
Trachoma (1st) Onchocerciasis (2nd)
Most common cause of visual impairment in the world
Refractive error
Most common type of colour blindness
Red-green
Most common cause of nutritional blindness
Vitamin A deficiency → nyctalopia
Most common cause of irreversible blindness in the world
Glaucoma
Layers of the Neurosensory retina
My nerves get in knots outside our easy practice review
Internal limiting membrane
Nerve fiber (ganglion cell axons)
Ganglion cell layer (ganglion cell bodies)
Inner plexiform
Inner nuclear (glial and bipolar cell bodies)
Outer plexiform
Outer nuclear (photoreceptor bodies)
External limiting membrane
Photoreceptors
Tamoxifen
vortex keratopathy
Duane Syndrome
globe retract during adduction
co-innervation of both the LR and MR by CN3
Brown Syndrome
Limited elevation when adducted
- Upgaze causes a characteristic clicking sensation
- Caused by mechanical restriction of the superior oblique
- Can be found congenitally or after trauma
collagens are found in the cornea
1 & 4
X-linked Recessive
COLF
Congenital Retinoschisis
Ocular Albinism
Lowe Syndrome
Fabry Disease
A son can only be effected if the mother is also effected
Sickle cell severity
HbSS - worst systemic disease
HbSC - worst ocular disease
Proliferative sickle cell retinopathy classification
Goldberg
Autosomal Dominant
- Congenital Cataracts
- Corneal Dystrophies
- Marfan Syndrome
- Stickler Syndrome: defective collagen 2 –> empty vitreous
- Tuberous sclerosis, von-hippel lindau and NF
Which IOP lowering agent is contraindicated in phacomorphic glaucoma
Pilocarpine
CRVO tx
Neovascularization → Panretinal photocoagulation laser
Macular oedema → Anti-VEGF or Ozurdex® (dexamethasone implant)
Collagen in Sclera and corneal stroma
1
(Sclera is type 1 and 3)
Collagen in Vitreous and Lens capsule
2
Collagen in Descemet’s membrane of cornea
4
Best test for investigating nasolacrimal anatomy?
Dacryocystography
Retinoscopy
Similar to ophthalmoscope - difference is that light source of retinoscope can be quickly moved off the visual axis
Myopia → red reflex moves against direction of light
Hyperopia → red reflex moves with direction of light
Staphylococcal blepharitis
a/w Atopic dermatitis