Method for determining a parameter of an optical equipment, the method comprising: - an optical equipment positioning step (S1), during which an optical equipment comprising a pair of optical lenses mounted on a spectacle frame is positioned in a first position and is physically received by a receiving element , - a portable electronic device positioning step (S2), during which a portable electronic device comprising an image acquisition module and measuring means is positioned in a second position determined and/or known relatively to the first position so as to acquire an image of a distant element seen through at least part of the optical lenses of the optical equipment in the first position and the portable electronic device is physically received by an acquisition receiving element so as to assure an accurate and controlled position and orientation between the acquisition module and the optical equipment, - a position determining step (S4), during which the distance and the relative orientation of the image acquisition module of the portable electronic device and the optical equipment are determined using at least measuring means of the portable electronic device, those means consisting of a 3D / stereo camera or a telemeter, and - a parameter determining step (S5), during which at least one optical parameter of the optical equipment is determined based on the image of a distant element seen through at least part of the optical lenses of the optical equipment in the first position and the determined distance and the relative orientation of the image acquisition module of the portable electronic device and the optical equipment. - an optical equipment positioning step (S1), during which an optical equipment comprising a pair of optical lenses mounted on a spectacle frame is positioned in a first position and is physically received by a receiving element , - a portable electronic device positioning step (S2), during which a portable electronic device comprising an image acquisition module and measuring means is positioned in a second position determined and/or known relatively to the first position so as to acquire an image of a distant element seen through at least part of the optical lenses of the optical equipment in the first position and the portable electronic device is physically received by an acquisition receiving element so as to assure an accurate and controlled position and orientation between the acquisition module and the optical equipment, - a position determining step (S4), during which the distance and the relative orientation of the image acquisition module of the portable electronic device and the optical equipment are determined using at least measuring means of the portable electronic device, those means consisting of a 3D / stereo camera or a telemeter, and - a parameter determining step (S5), during which at least one optical parameter of the optical equipment is determined based on the image of a distant element seen through at least part of the optical lenses of the optical equipment in the first position and the determined distance and the relative orientation of the image acquisition module of the portable electronic device and the optical equipment. <EOS>