A head mounted retinal projection system comprising: at least first and second image projection units configured and operable for projection of at least first and second image portions respectively; and an eye projection optical module optically coupled to the at least first and second image projection units; said eye projection optical module comprising: two initial relay modules (122a, 122b) associated with said first and second image projection units respectively for relaying light of said first and second image portions (1300, 1400) respectively, and a beam combiner (M1, M2) configured and operable to combine optical paths of projection of said first and second image portions (1300, 1400) from the at least first and second image projection units, along a general optical path, along which light beams of said first and second image portions (1300, 1400) are to be directed to propagate towards a user's eye for projecting a combined image comprising said first and second image portions on the retina; and wherein the two initial relay modules (122a, 122b) comprise respective lenses (L1a, L1b, L2, L2a, L2b) having different optical powers such that the first image portions projected by the first image projection unit occupy a smaller area at a center of the combined image than the second image portions projected by the second image projection unit and surrounding said first image portions. at least first and second image projection units configured and operable for projection of at least first and second image portions respectively; and an eye projection optical module optically coupled to the at least first and second image projection units; said eye projection optical module comprising: two initial relay modules (122a, 122b) associated with said first and second image projection units respectively for relaying light of said first and second image portions (1300, 1400) respectively, and a beam combiner (M1, M2) configured and operable to combine optical paths of projection of said first and second image portions (1300, 1400) from the at least first and second image projection units, along a general optical path, along which light beams of said first and second image portions (1300, 1400) are to be directed to propagate towards a user's eye for projecting a combined image comprising said first and second image portions on the retina; and wherein the two initial relay modules (122a, 122b) comprise respective lenses (L1a, L1b, L2, L2a, L2b) having different optical powers such that the first image portions projected by the first image projection unit occupy a smaller area at a center of the combined image than the second image portions projected by the second image projection unit and surrounding said first image portions. two initial relay modules (122a, 122b) associated with said first and second image projection units respectively for relaying light of said first and second image portions (1300, 1400) respectively, and a beam combiner (M1, M2) configured and operable to combine optical paths of projection of said first and second image portions (1300, 1400) from the at least first and second image projection units, along a general optical path, along which light beams of said first and second image portions (1300, 1400) are to be directed to propagate towards a user's eye for projecting a combined image comprising said first and second image portions on the retina; and wherein the two initial relay modules (122a, 122b) comprise respective lenses (L1a, L1b, L2, L2a, L2b) having different optical powers such that the first image portions projected by the first image projection unit occupy a smaller area at a center of the combined image than the second image portions projected by the second image projection unit and surrounding said first image portions.