1. A computer-implementable method of analysing tissues of a retina, the method comprising: receiving a polarization-sensitive (PS-OCT) image data set of the retina from a polarization-sensitive device, each element in the polarization-sensitive image data set being associated with an intensity value ({I 1 ,. .. , I L }) and a polarization direction ({P 1 ,. .. , P L }); determining a likelihood score for each element of the polarization-sensitive image data set based on the intensity value of the element and a degree of divergence (μ* T P or D 2 ) of the polarization direction associated with the element from a reference polarization direction (μ*) associated with the polarization sensitive image data set, wherein the likelihood score indicates whether said element is drawn from a directionally polarized distribution or a depolarizing distribution; and classifying elements of the polarization-sensitive image data set using the determined likelihood scores to analyse tissues of the retina.