28 results
ophthalmology physicalexam ocular clinical neurology video pathophysiology diagnosis fundoscopy nystagmus differential retraction syndrome atrophy hippus nejm parinauds retina retinal signs
Myopia: Pathogenesis and clinical findings • Axial length of eye -> Long axial length of the
Myopia: Pathogenesis ... lens) -> light convergence ... Increased light convergence ... the retina => Myopia ... distant vision #Myopia
Ocular Changes in Myopia • Emmetropia +2.0 D to -0.25 D • Myopia ≤-0.5 D •
Ocular Changes in Myopia ... to -0.25 D • Myopia ... -0.5 D • High myopia ... • Pathologic myopia ... D or -6.0 D #Myopia
Convergence Retraction Nystagmus with a left 6th nerve palsy Caused by a Midbrain hemorrhage Dr. Boby Varkey Maramattom
Convergence Retraction ... @bobvarkey #Convergence
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 Myopic Retinopathy Fundoscopy Ocular Examination Posterior staphylomas and patchy chorioretinal atrophy. Dr. Sebastian Vega @oftalmopo #Myopic #Retinopathy #staphyloma #atrophy
Myopic Retinopathy ... @oftalmopo #Myopic
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 Hyperopia: Pathogenesis and clinical findings • Axial length of eye -> Short axial length of the
Decreased light convergence ... rays require less convergence ... rays require more convergence
Parinaud's Syndrome What? - Impaired upgaze - Light-near dissociation - Convergence retraction nystagmus - Eyelid retraction (Collier's
dissociation - Convergence
Cardiac Myocyte Contractile cycle - Ca2+ binds to TnC → TnI is inhibited → conformational change
between actin and myosin ... - Myosin heads ... boat, to “row” myosin ... released from the myosin ... itself, allowing myosin
Parinaud's syndrome What? • Light-near dissociation (tectal pupils) • Convergence retraction nystagmus • Eyelid retraction (Collier's sign)
tectal pupils) • Convergence
Visual Pathway Neural Lesions A) Optic Nerve → Left Anopia B) Optic Chiasm → Bitemporal Hemianopia C) Lateral Geniculate
Optic Nerve → Left Anopia
Argyll-Robertson Pupil on Physical Exam Small (myotic), irregular pupil that do not react to light but do
Physical Exam Small (myotic
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