<prompt> The most common ophthalmic affection of diptheria isPtosisTotal ophthalmoplegiaIsolated ocular palsiesOphthalmoplegia extema  <response>: Complications Obstruction of the respiratory tract by pseudo membraneMyocarditisPolyneuropathyPost diphtheritic paralysisOccurs in the 3rd or 4th weekPalatine and papillary paralysis is characteristicSpontaneous recovery is the rule.PneumoniaOther less common complications are renal failure, encephalitis, cerebral infarction, pulmonary embolism and bacteremia or endocarditic. 