No abstract

Communication between paranasal sinuses and orbital wall can occur after trauma, infection or surgery. In such cases repeated increase in intranasal pressure can lead to one way entry into the orbit due to ball valve mechanism. This leads to tension pneumo orbitus, a condition, which can cause rapid deterioration of vision, diplopia and proptosis.Immediate treatment in the form of, either needle aspiration or repair of medial orbital wall is recommended. In this case report visual loss and proptosis recovered spontaneously in 8 days. The literature has been reviewed.