Graves opthalmopathy is most common cause of U/L or B/L proptosis in adults between age of 25-50 yearsQ Werner Classification reflect severity of opthalmopathy and is well known by acronym of NO SPECS. Grade 0 - No signs or symptoms Grade 1 - Only signs (lid retraction with or without lid lag Q & mild proptosis) Grade 2 - Soft tissue involvement (chemosis, grit, lacrimation, photophobia, lid or conjuctival swelling) Grade 3 Proptosis Q (minimal28) Grade 4 Extraocular muscle involvement Q (limitation of movement & diplopia) Grade 5 Corneal involvement (exposure keratitis) Grade 6 Loss of Sight (d/t optic nerve involvement with disc pallor or papilloedema & visual field defect)">