Methods and systems for updating refractive prescriptions and delivering eyeglasses and contact lenses

A method for updating a refractive prescription for human eyes, the method comprising:

• receiving current information of eyes of a tested subject, the current information comprising a) identification information of current corrective lenses of the tested subject, the identification information assigned at a first location, and b) a current visual acuity VAc for each eye of the tested subject with the current corrective lenses, the current visual acuity VAc being assessed at a second location;
• using the identification information of the current corrective lenses to retrieve historical data, wherein the historical data includes:
• i) a historical prescription comprising a spherical power fs1 for the current corrective lenses, a cylinder power fc1 and a cylinder angle fa1;
• and ii) a historical visual acuity profile Va(Δfs) describing a relationship between a plurality of measured visual acuities Va(i) and a plurality of variations in spherical power Δfs(i) on top of the historical prescription;
• computing a new spherical power fs2 based on the current visual acuity VAc and the historical visual acuity profile Va(Δfs);
• and
• generating a new prescription for a new pair of corrective lenses, wherein the new prescription includes the new spherical power fs2, the cylinder power fc1 and the cylinder angle fa1.

A system for producing a refractive prescription of corrective lenses for eyes of a tested subject, comprising:

• a storage module configured to store I) a first prescription for a first pair of corrective lenses, wherein the first prescription comprises a spherical power fs1, a cylinder power fc1 and a cylinder angle fa1, and II) a historical visual acuity profile Va(Δfs) that describes a relationship between a measured visual acuity Va(i) and a variation in spherical power Δfs(i), the historical visual acuity profile Va(Δfs) being measured at a first time point;
• an input module configured to receive a second visual acuity Va2 of the eyes of the tested subject, the second visual acuity Va2 being measured at a second time point using the first prescription or the first pair of corrective lenses according to the first prescription;
• a computer module configured to a) retrieve the first prescription from the storage module, b) receive information from the input module;
• c) compute a new spherical power for each eye of the tested subject based on the historical visual acuity profile Va(Δfs) and the second visual acuity Va2, and c) generate a second prescription for a second pair of corrective lenses based on the first prescription and the computed new spherical power for each eye;
• and
• an output module configured to export the second prescription.

A refraction system for producing a refractive prescription of corrective lenses, comprising:

• a refraction module configured to measure refractive errors in left and right eyes of a tested subject and to generate a prescription for a pair of corrective lenses with which both left and right eyes of the tested subject are corrected for best vision performance;
• an acuity profile module configured to measure and record a plurality of visual acuities of the left and right eyes of the tested subject as a function of spherical power, the measuring comprising changing a spherical power setting in the refraction module and recording each visual acuity at each spherical power setting based on feedback of the tested subject, wherein an acuity profile comprises the plurality of visual acuities;
• and
• an output module configured for 1) printing, displaying, and exporting the generated prescription for the pair of corrective lenses, and 2) printing, displaying, and exporting the acuity profile.

A method for producing a refractive prescription of corrective lenses, the method comprising:

• determining, at a first time point, a first prescription of a first pair of corrective lenses worn by a tested subject, the determining being based on a record of a previous prescription or using a lensometer to measure the first pair of corrective lenses, wherein the first prescription includes a spherical power fs1, a cylinder power fc1 and a cylinder angle fa1;
• measuring a first visual acuity profile Va(Δfs) of each eye of the tested subject at the first time point, the first visual acuity profile Va(Δfs) comprising a plurality of visual acuities Va(i) measured using the first prescription with a plurality of variations in spherical power Δfs(i);
• recording the first visual acuity profile Va(Δfs) that describes a relationship between the measured plurality of visual acuities Va(i) and the variations in spherical power Δfs(i);
• and
• generating a new prescription of corrective lenses for the tested subject at a second time point later than the first time point, using the first visual acuity profile Va(Δfs).

A method for updating a prescription of corrective lenses, the method comprising:

• using, at a first time point, a refraction device in an optical office to obtain a first pair of corrective lenses for eyes of a tested subject with the following information collected:
• a) a first prescription of the first pair of corrective lenses, and b) vision performance of the eyes that is measured with the first pair of corrective lenses plus a plurality of variations in spherical power Δfs(i);
• collecting, at a second time point, a visual acuity Va2 of the eyes with the first pair of corrective lenses by non-optically trained person at a location away from any optical office when a second pair of corrective lenses is ordered away from any optical office;
• determining a change in spherical power of each eye from the first time point to the second time point;
• and
• generating a second prescription for the second pair of corrective lenses based on the information collected at the optical office and the visual acuity Va2.

A method for updating a prescription of corrective lenses, the method comprising:

• using a refraction device in an optical office to obtain a first pair of corrective lenses for eyes of a tested subject with the following information collected:
• a) a first prescription of the first pair of corrective lenses, and b) a first visual performance of the eyes, the first visual performance comprising a visual acuity profile Va(Δfs) of the eyes with the first pair of corrective lenses, wherein the refraction device is used to measure refractive errors of both left and right eyes of the tested subject;
• collecting a second visual performance of the eyes comprising a second visual acuity Va2 with the first pair of corrective lenses by self-administration away from any optical office, wherein the collecting of the second visual performance is performed for a plurality of variations in spherical power Δfs(i) by i) measuring acuity through lenses and the first pair of corrective lenses or ii) placing an acuity chart at a plurality of distances;
• and
• generating a new prescription for a new pair of corrective lenses based on the information collected at the optical office and the second visual performance collected with the first pair of corrective lenses away from any optical office.