We present the results of proximity effect analysis both in the longitudinal as well as in the transverse directions, by carrying out a statistical comparison of the Ly-alpha absorption lines in the vicinity of quasars to those seen far away in the general
inter-galactic medium (IGM). We have used spectra of 181 projected quasar pairs at separation less than 1.5 arcmin from the Sloan Digital Sky-Survey Data Release 12 in the redshift range of 2.5 to 3.5 to probe the proximity regions of the foreground quasars. For the first time this was done using a control sample of
IGM, matched in absorption redshift and signal-to-noise ratio to that of the proximity region. In our analysis, we found that the ratio of observed median optical depths of the proximity region and the IGM around the quasar within r less than 3Mpc differs in the longitudinal and transverse directions which deviates from unity at 2.37 sigma and 2.45 sigma level respectively. However, after taking into account the quasars ionisation, validated for spectra at SDSS resolution using detailed simulations, we found that the corrected steeply increase towards the quasar both in the longitudinal and the transverse directions, with an averaged value of 1.53 and 1.76 deviating from unity at 3.85 sigma and 9.35 sigma significance respectively. The difference of the corrected among these two directions is found to be significant at 2.3 sigma level, being higher in the transverse direction. We discuss the possible scenarios that can
explain this observed difference. We also present newly discovered quasar pairs, at an angular separation of smaller than 1 arcmin confirmed spectroscopically.