BACKGROUND Secondary glaucoma is an anatomically identifiable abnormality which in turn is an underlying cause of the events that lead to aqueous outflow obstruction and rise in the intraocular pressure. This prospective study mainly highlights the secondary glaucoma with special reference to its proportion, causes and its risk factors in a tertiary care hospital. METHODS This study was a cross sectional study. Patients, who attended the Department of Ophthalmology after fulfilling the inclusion and exclusion criteria diagnosed with secondary glaucoma, were included in the study. The study period was from February 2018 to June 2020. A standard form was filled up for each patient documenting parameters and findings of various examinations and was evaluated as per protocol. RESULTS Secondary glaucoma was seen in 0.2 % patients who visited during the study period. Out of 106 patients, males were 50, females were 56, with a male: female ratio of 1:1.1. The most common cause of secondary glaucoma was lens induced glaucoma seen in 44.34 % followed by uveitic glaucoma in 20.8 % cases, traumatic 17.9 %, neovascular 10.4 %, pseudoexfoliation glaucoma 2.8 %, pigmentary glaucoma 1.9 %, silicon oil induced 0.9 %, and uveitis-glaucomahyphema syndrome in 0.9 % cases. Around thirty five percent (34.9 %) cases presented with sudden onset of painful diminution of vision with nausea and vomiting. CONCLUSIONS Secondary glaucoma is still one of the prevalent diseases in this part of country. Lens induced glaucoma is still the most common cause of secondary glaucoma. Hypermature cataract, uveitis, trauma and neovascularisation are the different risk factors. KEYWORDS Secondary Glaucoma, Lens Induced Glaucoma, Phacomorphic Glaucoma, Uveitic Glaucoma

BACKGROUNDHeadache is one of the causes of discomfort to a human being and can be classified as primary or secondary headache. CT scan has proved to be useful when the neurological physical examination is abnormal. The aim of the study is to-1. Determine the causes of headache of patients presenting with nontraumatic headache by CT scan at Tripura Medical College and Dr. B.R. Ambedkar Memorial Teaching Hospital, Hapania, Agartala, West Tripura. 2. Correlate the clinical diagnosis and the CT scan findings of patients with nontraumatic headache. MATERIALS AND METHODSA total of 157 patients presented with nontraumatic headache underwent CT scan examination in the Radiodiagnosis Department of Tripura Medical College and Dr. B.R. Ambedkar Memorial Teaching Hospital, Hapania, Agartala, West Tripura and scans were viewed for the presence of any secondary cause of headache and findings were expressed as frequency and percentage. Statistical Analysis-The data were entered in spreadsheet and analysed using SPSS 21 statistical software. Results were expressed as frequency and percentage. RESULTSIn our study, female patients (50.96%) were slightly more than the male (49.04%) patients and majority of the patients were in the age group of >20 to ≤40 years (54.14%) followed by >40 to ≤60 years (25.47%).Primary headache (73.89%) was found to be more common than secondary headache (26.11%). Sinusitis (73.17%) was the commonest cause of secondary headache. Prevalence of positive CT scans of patients presenting with headache was 26.11%. Most of the clinical diagnosis did not correlate (61.78%) with the CT scan finding. Patients with clinical diagnosis of migraine correlates mostly with the CT scan finding (69.44%), which is one of commonest cause of primary headache where we got negative findings in CT scan followed by sinusitis (38.77%), CVA/ICH (cerebrovascular accident and intracerebral haemorrhage) 32.25% and brain SOL (25%). CONCLUSIONCT scan has a role in determining the cause of headache. Primary headache is more common than secondary headache. CT scan has a significant role in detecting intracranial pathology in patient presenting with headache associated with abnormal neurological function.