Ophthalmology General 572f1e60 Most common cause of unilateral proptosis is A Thyrotoxicosis B Retinoblastoma C Intraocular haemorrhage D Raised intracranial tension High-Yield Explanation A i.e. Thyrotoxicosis Grave's ophthalmopathy is most common cause of U/L or B/L proptosis in adults Q between age of 25-50 yrsQ