Aim: The purpose of this study was to evaluate the high frequency sonographic characteristics of limbal tumors, their extent and invasion in the adjacent conjunctival and corneal tissue with the help of ultrasoundbiomicroscopy (UBM). Material And Method: Sixty three cases of limbal tumors with conjunctival and or corneal extension were enrolled in our prospective non-randomized study and subjected to clinical and UBM examination. Result: Sixty three eyes of 63 patients were subjected to UBM. All masses had hyperechoic, highly reflective surface with solid acoustic internal pattern in 58(89.2%) cases. With the help of 50 MHz high frequency ultrasound the posterior margin was demarcated in 57(81%) of tumors and lateral margin in 42(67%).Intraocular tumor extension was appreciated as shallowing of anterior chamber, thickening of cilliary body and breach in Descemet__ampersandsignrsquo;s membrane. Conclusion: Ultrasound biomicroscopy has dramatically improved resolution of anterior segment structures by noninvasive means. In vivo imaging of limbal tumors along with their biometry, delineation and extension helped us to decide the treatment protocol in our patients and proved to be an important diagnostic adjunct in management of limbal tumors. In the 54 patients we operated upon the sonographic findings correlated with clinicopathological results.