Device for making opthalmic measurements and method

Claim 1

Apparatus for applying ophthalmic measurements directly to a spectacle frame comprising: a main supporting section including a pair of depending measuring plates; means for detachably connecting said main supporting section and measuring plates to said spectacle frame with said plates disposed forwardly of lens rims of the frame; a one-piece reticle having vertical and horizontal legs carried by each of said depending plates within the area circumscribed by right and left rims respectively of said spectacle frame and each disposed generally forwardly of one of right and left eyes of a patient wearing said frame and measuring apparatus, means for adjusting each one-piece reticle as a unit in directions horizontally and vertically relative to a selected point on a respectively adjacent eye and wherwith a point on at least one leg of said reticle may be centered with said eye; and dual scale means on each of said plates, one of said scale means being so disposed and calibrated as to indicate to a user of the apparatus when read, a measurement of the distance in one direction from said point on said reticle to the extreme lateral extension of the adjacent lens rim of said spectacle frame and the other scale means being so disposed and calibrated as to similarly indicate a measurement of the distance from said point on said same reticle to the extreme inferior extension of said lens rim, said dual scale means being so constructed and arranged as to provide both of said measurements simultaneously and with a single setting of adjustment of said unitary reticle in each case of each right and left eye of said patient, visul perception of said scales being required to effect said readings.