Posterior scleritis is a relatively uncommon disorder and often misdiagnosed owing to its variable presentations. We describe two cases of posterior scleritis. Both the cases underwent a complete ophthalmic examination, fluorescein angiography, B-scan ultrasonography, systemic evaluation including physical examination and laboratory investigations. We did not find any associated systemic disease in our cases inspite of extensive investigations. Both the cases showed a good response to oral steroid in tapering dose. To detect the underlying disease, for proper treatment and assessment of prognosis, diagnostic work-up is needed. B-scan ultrasonography is the most useful diagnostic tool in such patients. Early diagnosis of posterior scleritis is important due to its excellent response to anti-inflammatory medication, particularly with systemic steroid and most common etiology being idiopathic.