Image artifact using imagesc

Consider the asymmetry in these two images. They should appear symmetric. Why don't they?

figure,colormap gray; 

subplot(1,2,1)
imagesc(eye(2)*eps, [-1 1]); 
title('imagesc(eye(2)*eps, [-1 1])'), axis image

subplot(1,2,2)
imagesc(-eye(2)*eps, [-1 1]); 
title('imagesc(-eye(2)*eps, [-1 1])'), axis image

[Matt J]

Both images appear perfectly symmetric to me, if symmetric means image=tranpose(image). However, I think this displays it better,

    subplot(1,2,1)
    imagesc(eye(2)*eps, [-1 1]*eps); 
    title('imagesc(eye(2)*eps, [-1 1])'), axis image
    subplot(1,2,2)
    imagesc(-eye(2)*eps, [-1 1]*eps); 
    title('imagesc(-eye(2)*eps, [-1 1])'), axis image