Dr Ridham Nanda et al JMSCR Volume 05 Issue 07 July 2017 Page 25049 JMSCR Vol||05||Issue||07||Page 25049-25055||July 2017 Role of B-Scan Ultrasonography in Evaluating Posterior Segment of the Eye in the Event of Non Visualization of Fundus Authors Dr Ridham Nanda, Dr Dinesh Gupta, Dr Priyanka Sodani Postgraduate Department of Ophthalmology, Government Medical College, Jammu Corresponding Author Dr Ridham Nanda House No. 49, Denis Gate, Near Mansar Hotel, Jammu - 180001, J&K, India Mob: 9419617971, Email: ridznanda@gmail.com Abstract Background: Evaluation of posterior segment of eye in hazy ocular media is difficult ophthalmoscopically. B-scan ultrasonography is an important tool in such cases. Purpose: To evaluate the status of the posterior segment of eyes in patients with opaque ocular media due to any reason. Materials and Methods: This prospective study was conducted in the Ophthalmology department of a tertiary care hospital over a period of one year from November 2015 to October 2016, on two hundred patients presenting with opaque ocular media. After detailed history and clinical examination, B-scan ocular examination was done using ultrasound machine - Nidek US-4000 (Echoscan) with the contact method. Data was entered in Microsoft excel and Chi Square test was used for statistical analysis. Results: Out of 200 patients, 141 (70.5%) were males and 59 (29.5%) -females. The patients had an age range between 6 months to 90 years. The mean age was 47.845 ± 22.95 years. Majority of patients (34%) were in the age group ≥61 years. The most common indication of ocular sonography in our study was opaque media due to lenticular opacity (48.5%). One hundred eight patients (54%) did not demonstrate any posterior segment pathology on B-scan echography. Two most common posterior segment lesions found in our study were vitreous haemorrhage (VH) - 18.50% and retinal detachment (RD) combined with vitreous disorders- 8%, respectively. Other B-scan findings were isolated retinal detachment group which comprised 7%, retinoblastoma - 1.5% patients, total choroidal detachment (1.5%), endophthalmitis (1%), dislocated PCIOL in vitreous (1%) and phthisis bulbi -0.5%. Conclusion: B scan ultrasonography is an indispensible tool in examination of posterior segment in patients with opaque ocular media, where a preoperative fundoscopic evaluation is virtually impossible. Keywords: B scan, posterior segment, opaque ocular media INTRODUCTION Ultrasound is an acoustic wave that consists of oscillation of particles. By definition ultrasound waves have frequency greater than 20 kHz. For diagnostic ophthalmic ultrasound, frequencies used are generally in the range of 8 to 10 MHz. These very high frequencies used in ophthalmology produce short wavelengths. These very short wavelengths allow resolution of minute structures in the eye and orbit. www.jmscr.igmpublication.org Impact Factor 5.84 Index Copernicus Value: 83.27 ISSN (e)-2347-176x ISSN (p) 2455-0450 DOI: https://dx.doi.org/10.18535/jmscr/v5i7.124