Optical coherence tomography (OCT) plays a very important role in retinal/choroidal examination. However, image blurring can be introduced into the OCT images during the image acquirement process, resulted from the movement of eye or the out-of-focus effect of the imaging machine. Therefore, OCT image deblurring is of great importance in practice. In this paper, we use an expectation-maximization (EM) based image deconvolution technique for eliminating the blur effect in the OCT images. The proposed technique is designed based on several of the special characteristics of the OCT retinal image and is validated to be able to outperform various state-of-the-art image deblurring techniques as shown by the experimental results in the paper.