PURPOSE:To study the role of optical coherence tomography in central serous chorioretinopathy. MATERIAL AND METHODS: A total of 48 eyes of 48 patients with a clinical diagnosis of central serous chorioretinopathy were evaluated with spectral domain optical coherence tomography. After detailed ocular examination, followed by fundus fluorescein angiography, optical coherence tomography was performed and various anatomic features were noted. RESULTS: Out of 48 eyes, 41 had acute and 7 had chronic central serous chorioretinopathy. The mean age of the patients was 35 (SD7.1) years with male (83.4%) preponderance in our study. All patients had unilateral involvement with blurring of vision (43.75%) and metamorphopsia (31.25%) being the main presenting complaints. Fundus fluorescein angiography revealed a total of 56 leakage points with ink-blot pattern being 6 times more frequent than smoke-stack pattern in our study. On optical coherence tomography neurosensory detachment was seen in 44 eyes. Total macular thickness ranged from 220µm-1120µm (mean±SD:447±219) and vault height ranged from 100µm-900µm (mean±SD:350±187). Retinal pigment epithelial abnormality was seen in 87.5% eyes, retinal pigment epithelial detachment in 18.75% eyes and retinal pigment epithelial bulge in 27.09% patients. CONCLUSION: Optical coherence tomography can be used as a complimentary diagnostic tool in central serous chorioretinopathy.

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Background: The purpose of this study is to evaluate the causes of failure of dacryocystorhinostomy by computed dacryocystography (CT-DCG).Methods: CT-DCG was done in 38 patients of failed DCR of either sex in the age group of 16-60 years, the radiologist blinded to the clinical status of the patient evaluated position and size of bony ostium, soft tissue scarring, bony regrowth, secondary stenosis of canaliculi, synechiae between the ostium and nasal septum and anatomic variations in nasal cavity, turbinates or nasal septum.Results: The most common causes of failure in our study were inappropriate size of osteotomy window in 34 patients (84.47%), inappropriate location of osteotomy window in 31 patients (81.57%), fibrous tissue scarring at osteotomy window in 22 patients (57.89%), the other causes were bilateral concha bullosa in 2 patients, ethmoidal sinusitis in 2 patients, common canalicular block in 1 patient, faulty passage into ethmoidal sinus in 1 patient and no osteotomy window seen in patient.Conclusions: CT-DCG is a valuable imaging tool to evaluate DCR failure before re-operation. In our study CT-DCG showed that small size of osteotomy window, inappropriate position of osteotomy window and fibrous tissue scarring at osteotomy window were frequently seen causative factors of DCR failure.