Tuesday, 4 November 2014

Opthalmology mnemonics

Remember Keratoconus with the help of CONES:

Central scarring & Fleischer ring 
Oil drop reflex / Oedema (hydrops) 
Nerves prominent 
Excessive bulging of lower lid on downgaze (Munson’s sign) 
Striae (Vogt’s)

Remember Iridocorneal Endothelial Syndrome with ICE

Iris Naevus
Chandler Syndrome
Essential Iris Atrophy

Remember Behcet's Disease with the help of ORAL UPSET

Occlusive periphlebitis 
Retinitis 
Anterior uveitis 
Leakage from retinal vessels 
Ulceration (aphthous/genital) 
Pustules after skin trauma (Pathergy test) 
Scratching leaves lines (dermatographism) 
Erythema nodosum 
Thrombophlebitis

Remember posterior scleritis with POST SCLER

Proptosis 
Ophthalmoplegia 
Swelling of disc 
Thickening of sclera (US/CT) & T sign (fluid in sub-Tenon’s space) 
Subretinal exudates 
Choroidal foLds 
Exudative RD 
Ring choroidal detachment

Remember causes of Choroidal neovascular membrane with HAMMAR

Histoplasmosis
ARMD
Multifocal Choroiditis
Myopia
Angiod
Rupture of the choroid

Remember the causes of trabecular pigmentation withPIGMENT

Pseudoexfoliation & Pigment dispersion syndrome
Iritis
Glaucoma (Post angle closure Glaucoma)
Melanosis of angle (oculodermal melanosis)
Endocrine (Diabetes & Addison’s Syndrome)
Naevus (Cogan-reese syndrome)
Trauma

Remember sterilization in ophthalmology with ABCDEFG

AUTOCLAVE
BOILING
CHEMICALS like Alcohol (Rectified spirit), Isopropyl alcohol/CIDEX: 2% Glutaraldehyde
DRY HEAT temperature of 150°C is used for 90 minutes
ETHYLENE OXIDE for sterilization of IOL etc.
FUMIGATION of operation theatre/ FORMALIN vapour
GAMMA-IRRADIATION: Gamma rays from Cobalt-60

Remember the ocular structures derived from neuroectoderm with MORE

Muscles of pupil
Optic Nerve
Retina (with RPE)
Epithelium of Iris
Epithelium of Cilliary Body

Remember the structures derived from surface ectoderm with S1L2E3

Skin of Eyelids and its derivatives viz. cilia, tarsal glands, conjunctival gland
Lens, 
Lacrimal Gland,
Epithelium of Conjunctiva,
Epithelium of Cornea,
Epithelium of lacrimal passage

Remember Stromal dystrophies with Marilyn Monroe Always Gets Her Man in LA City.

Macular dystrophy
Mucopolysaccharide
Alcian blue

Granular Dystrophy
Hyaline material
Masson's Trichrome

Lattice Dystrophy
Amyloid
Congo Red

Remember the drugs causing cataract with ABCD

Amiodarone 
Busulphan 
Chlorpromazine 
Dexamethasone

Remember the causes of Uniocular diplopia as ABCD

Astigmatism
Behavioral: psychogenic
Cataract
Dislocated lens

Remember microtropia with 3 A

Anisometropia

Angle small

Absent central field (Central suppression scotoma)

Remember the refractive indices of ocular media with8303 (from anterior to posterior)

cornea 1.38
aq humour 1.33
lens 1.40
vit humour 1.33

Remember the types of colour blindness with TuB PaR DoG

TRITOANOPES = BLUE

PROTOANOPES = RED

DEUTROANOPES= GREEN

Remember the causes of lid retraction with 4 MP

4M= MMarcus Gunn jaw winkling syndrome,Myotonic causes like dystrophica myotonica.Metabolic cuses like uraemia,cirrhosis

4P=Perinauds syndrome,Parkinson's Disease/Progressive supranuclear palsy,PPalsy (aberrant III crnaial nerve regeneration)

Remember content & veins draining the Cavernous Sinus with Rule of 3

3 Afferent veins: Sphenoparietal sinus (Vault veins), Supf Middle cerebral Vein (Brain), Ophthalmic vein (Orbit)
3 Efferent Veins: Superior petrosal sinus, Inferior Petrosal Sinus, Communicating vein to pterygoid plexus
3 Contents; Cranial Nerves (III,IV, V1,V2 & VI)
3 Areas Drain into it: Vault Bones, Brain (Cerebral Hemisphere), Orbit
3 Nerves: Motor(III,IV,VI),Sensory (V1,V2), Sympathetic

Remember the causes of pseudo tumor cerebri with " Idiopathic IDEA"

Idiopathic

Infections-Otitis media,mastoiditis,viral infections etc

Drugs-Steroid withdrawl,Vitamin A intoxication,Nalidixic acid,amidarone,cyclosporin,minocycline

Endocrine-obese,amennorrheic woman of child bearing age, Hypoparathyroidism

Anaemia

Remember the causes of downbeat nystagmus withDoWNBEAT

Degeneration,Demyelination or Drugs (Lithium)

Wernicke's Encephalopathy

Neoplasm or paraneoplastic cerebeller degeneration

Brainstem disease (Syringomyelia)

Encephalitis

Arnold-Chiari malformation

Trauma or Toxin

Remember characteristics of congenital nystagmus withCONGENITAL

Convergence & eye closure dampens

Oscillopsia absent

Null zone that is present,increases foveation time which results in increased acuity

Gaze poisition doesnot change the horizontal direction of nystagmus

Equal amplitude and frequency in each eye

Near acuity is good

Inversion of optokinetic response

Turning of head to acheive null point

Abolishes in sleep

Latent (occlusion) nystagmus occurs

Remember "DWARF" for decribing Nystagmus

Direction=plane of movement-horizontal,vertical

Waveform= Pendular or Jerky

Amplitude= fine or coarse

Rest=At primary position or gaze evolked

Frequency= How often the eye moves

Remember the characteristics of Perinaud's Dorsal Midbrain Syndrome with "CLUES"

Convergence retraction nystagmus

Lightnear Dissociation

Upgaze paralysis

Eyelid retraction

Skew deviation

Remember ocular features of acromegaly with ACROM

Angiod streaks

Chiasmal syndrome

Retinopathy

Optic atrophy,papilloedema

Muscle enlargement

Remember the systemic features of Marfan syndrome withMARFANS

Mitral prolapse

Aortic dissection

Regurgitant aortic valve

Fingers long (arachnodactyly)

Arm span>height

Nasal voice (high arched palate)

Sternal excavation

Remember the ocular features of Marfan’s syndrome withCLUMPS

Cupping (glaucoma)

Lattice

Upward lens subluxation

Myopia

Cornea Plana

Sclera blue

Remember angle structures with "I Can See Till Schwalbe's Line"

Iris root

Cilliary Body

Scleral spur

Trabecular Meshwork

Schwalbe's Line

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