A wearable optical display system comprising: a user attachment section for detachably mounting said wearable optical display system to at least part of a head of a user ; a partially transmissive partially reflective optical part , at least partly coupled with said user attachment section , and configured to be facing at least one eye of said user; and an electro-optical unit , at least part of which is coupled with at least one of said user attachment section and said partially transmissive partially reflective optical part , said electro-optical unit comprising: a plurality of lenses ; a plurality of reflectors having at least one nose-positioned reflector being positioned at a side of a nose of said user, unobstructed field of regard (FOR) to said at least one eye; and a light projection unit for projecting light beams onto said partially transmissive partially reflective optical part via said at least one nose-positioned reflector being interposed along an optical path between said light projection unit and partially transmissive partially reflective optical part , for viewing at least part of a projection of said light beams by said at least one eye, wherein an intermediate image forms along said optical path before and after said at least one nose-positioned reflector . a user attachment section for detachably mounting said wearable optical display system to at least part of a head of a user ; a partially transmissive partially reflective optical part , at least partly coupled with said user attachment section , and configured to be facing at least one eye of said user; and an electro-optical unit , at least part of which is coupled with at least one of said user attachment section and said partially transmissive partially reflective optical part , said electro-optical unit comprising: a plurality of lenses ; a plurality of reflectors having at least one nose-positioned reflector being positioned at a side of a nose of said user, unobstructed field of regard (FOR) to said at least one eye; and a light projection unit for projecting light beams onto said partially transmissive partially reflective optical part via said at least one nose-positioned reflector being interposed along an optical path between said light projection unit and partially transmissive partially reflective optical part , for viewing at least part of a projection of said light beams by said at least one eye, wherein an intermediate image forms along said optical path before and after said at least one nose-positioned reflector . a plurality of lenses ; a plurality of reflectors having at least one nose-positioned reflector being positioned at a side of a nose of said user, unobstructed field of regard (FOR) to said at least one eye; and a light projection unit for projecting light beams onto said partially transmissive partially reflective optical part via said at least one nose-positioned reflector being interposed along an optical path between said light projection unit and partially transmissive partially reflective optical part , for viewing at least part of a projection of said light beams by said at least one eye, wherein an intermediate image forms along said optical path before and after said at least one nose-positioned reflector . <EOS>