US 12,366,502 B2
System and method for determining a rounded value of an optical feature of an ophthalmic lens adapted to provide a dioptric correction for improving the vision of a subject
Helene Starynkevitch, Charenton-le-Pont (FR); and Adele Longo, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 18/005,221
Filed by Essilor International, Charenton-le-Pont (FR)
PCT Filed Jul. 13, 2021, PCT No. PCT/EP2021/069488
§ 371(c)(1), (2) Date Jan. 12, 2023,
PCT Pub. No. WO2022/013231, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 20305814 (EP), filed on Jul. 15, 2020.
Prior Publication US 2023/0266198 A1, Aug. 24, 2023
Int. Cl. G01M 11/02 (2006.01); A61B 3/028 (2006.01); G16H 10/20 (2018.01)
CPC G01M 11/0207 (2013.01) [A61B 3/028 (2013.01); G16H 10/20 (2018.01)] 16 Claims
OG exemplary drawing
 
1. A system for determining a rounded value of an optical feature of at least an ophthalmic lens adapted to provide a dioptric correction for improving vision of a subject, said system including
an optical device for performing a subjective test including assessing visual performance of the subject placed in two different optical situations and a computer comprising at least one processor programmed to:
a) determine a first test value of the optical feature and a first variation increment of the optical feature,
b) perform, using said optical device, a first trial of said subjective test wherein two first different optical situations are determined based on at least the first test value,
c) determine a second test value of the optical feature based on the first test value, on the first variation increment and on the result of the first trial performed in b),
d) perform, using said optical device, a second trial of said subjective test wherein two second different optical situations are determined based on at least the second test value,
e) determine an intermediary value of the optical feature based on a result of the first trial performed in b) and on a result of the second trial performed in d), and
f) determine said rounded value of the optical feature by rounding said intermediary value to a reference value, said rounding modifying the dioptric correction of said ophthalmic lens by less than a predetermined basic dioptric value.