Method for designing a pair of ophthalmic lenses and device for optical measurements. The method comprises: determining a distance and placing an object (100) at said distance； placing a frame (4) of reference on the user； for each eye: keeping it uncovered and covering the other eye； placing in front of the eye a screen (5, 6) with a through hole (520, 620)； shifting the position of the hole (520, 620) until the user sees said object (100) looking through the hole (520, 620), so that said object (100) is centred in the field of view available； uncovering both eyes； adjusting the positions of the holes (520, 620), to obtain binocular vision； and designing each lens (510, 610) according to said position. The device (1) comprises a frame (2) to which, for each eye, a first plate (51, 61) having a vertical groove (53, 63) and a second plate (52, 62) having a horizontal groove (54, 64) are attached and can be shifted. So that, when the grooves overlap, a pinhole (55, 65) is formed.
