It may be a case of orbital cellulitis with cavernous sinus thrombosis or venous sinus thrombosis. The risk factors for such a condition are diabetes, boils over nose and adjacent area. It is an emergency case and should be dealt seriously as it carries high risk of vision loss. Take opinion from neurologist also . MRI with contrast with orbital cuts and MR venography is required for full evaluation . Rest investigations and treatment may be decided by your ophthalmologist and neurologist. Other possible diagnosis may be kept pending patient evaluation and reports. Best wishes for early recovery.