# US 2017/0280990 A1 · Method for generating eyeglass-prescription assisting information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0280990 A1 - Document ID: US20170280990A1 - Status: Published application - Kind: A1 - Application number: 15/475,854 - Filed: 2017-03-31 - Published: 2017-10-05 - Earliest claimed: 2016-03-31 - Assignees: Nidek Co., Ltd. - Applicants: Nidek Co., Ltd. - Inventors: Kazunari SHIMIZU; Shirohisa KOBAYASHI - Web page: https://patentgrep.com/patent/US20170280990A1 ## CPC - A61B 3/0025: {characterised by electronic signal processing, e.g. eye models} - A61B 3/1015: {for wavefront analysis} - A61B 3/103: for determining refraction, e.g. refractometers or skiascopes - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A CPU of an eyeglass-prescription assisting apparatus is configured to obtain measurement data on an examinee's eye measured by a wavefront sensor, including first distribution data on a refractive error distribution of an examinee's eye and second distribution data on a refractive power distribution in an eyeglass lens to correct the refractive error of the examinee's eye. The CPU further makes arithmetic processing to obtain third distribution data on a refractive error distribution taking correction with the eyeglass lens into consideration based on the first distribution data and the second distribution data. ## Claims ### Claim 1 A method for generating eyeglass-prescription assisting information, comprising: an acquisition step of causing a computer to obtain measurement data on an examinee's eye measured by a wavefront sensor, the measurement data including first distribution data on a distribution of refractive error of the examinee's eye and second distribution data on a distribution of refractive power of an eyeglass lens to correct the refractive error of the examinee's eye; and an arithmetic step of causing the computer to obtain third distribution data on a distribution of the refractive error taking correction with the eyeglass lens into consideration based on the first distribution data and the second distribution data. ### Claim 2 (depends on 1) The method for generating eyeglass-prescription assisting information according to claim 1, wherein the acquisition step includes causing the computer to obtain measurement data on a partial region as the second distribution data from among the measurement data on the refractive power distribution of the eyeglass lens measured by a lens meter. ### Claim 3 (depends on 2) The method for generating eyeglass-prescription assisting information according to claim 2, wherein the arithmetic step includes causing the computer to match an extracting point of the first distribution data in a pupil of the examinee's eye and an extracting point of the second distribution data in the partial region of the eyeglass lens for at least one of number or position of the extracting points to obtain the third distribution data based on the first distribution data and the second distribution data after having been matched. ### Claim 4 (depends on 2) The method for generating eyeglass-prescription assisting information according to claim 2, wherein the arithmetic step includes causing the computer to set a size of the partial region according to a pupil diameter of the examinee's eye. ### Claim 5 (depends on 2) The method for generating eyeglass-prescription assisting information according to claim 2, wherein the arithmetic step includes causing the computer to set the partial region in consideration of a relative positional relationship between the eyeglass lens and the examinee's eye. ### Claim 6 (depends on 2) The method for generating eyeglass-prescription assisting information according to claim 2, wherein the acquisition step includes causing the computer to obtain the second distribution data set based on an eye point corresponding to a position of the examinee's eye with respect to the eyeglass lens when the eyeglass lens is worn on the examinee's eye. ### Claim 7 (depends on 1) The method for generating eyeglass-prescription assisting information according to claim 1, further including a correction result information generating step to be further executed by the computer to generate correction result information based on the third distribution data, the correction result information indicating appearance to the examinee's eye and representing a result of correction with the eyeglass lens. ### Claim 8 (depends on 7) The method for generating eyeglass-prescription assisting information according to claim 7, wherein the correction result information generating step includes causing the computer to generate a map image of the third distribution data as the correction result information. ### Claim 9 (depends on 7) The method for generating eyeglass-prescription assisting information according to claim 7, wherein the correction result information generating step includes causing the computer to generate a simulation image as the correction result information based on the third distribution data, the simulation image being an image simulating a target image to be formed on a fundus of the examinee's eye wearing the eyeglass lens. ### Claim 10 (depends on 9) The method for generating eyeglass-prescription assisting information according to claim 9, wherein the correction result information generating step includes causing the computer to generate the simulation image in consideration of a Stiles-Crawford phenomenon that sensitivity of photoreceptor cells decreases as an incident angle of light to a fundus is larger.