The most common ophthalmic affection of diptheria is –
Complications 

Obstruction of the respiratory tract by pseudo membrane
Myocarditis
Polyneuropathy
Post diphtheritic paralysis
Occurs in the 3rd or 4th week
Palatine and papillary paralysis is characteristic
Spontaneous recovery is the rule.
Pneumonia
Other less common complications are renal failure, encephalitis, cerebral infarction, pulmonary embolism and bacteremia or endocarditic.
Ptosis
Total ophthalmoplegia
Isolated ocular palsies
Ophthalmoplegia extema