1. An image processing method, comprising: obtaining a first two-dimensional image of a three-dimensional scene, each pixel location of the first image being associated with a respective distance parameter representing a distance of a viewer's eye to an object of the scene appearing at said pixel location in the first image; determining a respective spreading parameter for each pixel location as a function of parameters including the distance parameter associated with said pixel location, a dioptric power of a portion of a correction lens simulated as placed along a ray extending between the viewer's eye and the object of the scene appearing at said pixel location in the first image, and a simulated maximum accommodation power of the viewer's eye, wherein the spreading parameter determined for said pixel location is: proportional to 1 z + P corr if 1 z < - P corr , zero if - P corr ≤ 1 z ≤ - P corr + P acc ; and proportional to 1 z + P corr - P acc if 1 z > - P corr + P acc , where z is the distance of the viewer's eye to said object of the scene, P corr is the dioptric power of said simulated correction lens portion and P acc is the simulated maximum accommodation power of the viewer's eye; and applying a convolution operation based on the first image and the distribution of said spreading parameter to generate a second two-dimensional image with blur rendering.