Method and system for retrieving an optical parameter of an ophthalmic lens

A system for retrieving at least one parameter of an ophthalmic lens, comprising:

• at least one processor;
• a mobile device equipped with an image capture device;
• and
• a reflection device or a computer,
• wherein the at least one processor is configured to:
• obtain an image of a first and second patterns at a same time by using the image capture device located at a first position, the image including both the first and second patterns with the second pattern being entirely uncovered by the lens, the first and second patterns being different,
• obtain, from said image, a first set of data from at least a part of said first pattern that is seen by said image capture device through said lens,
• obtain, from said image, a second set of data from at least a part of said second pattern that is seen by said image capture device outside said lens, and
• retrieve said at least one optical parameter by using said first and second sets of data and taking account of positions, with respect to each other, of said image capture device, said lens and said first and second patterns.

A non-transitory storage medium having stored thereon one or more sequences of instructions that when executed by a processor, cause said processor to implement a method for retrieving at least one optical parameter of an ophthalmic lens, the method comprising:

• obtaining an image of a first and second patterns at a same time by using an image capture device located at a first position, the image including both the first and second patterns with the second pattern being entirely uncovered by the lens, the first and second patterns being different;
• obtaining, from said image, a first set of data from at least a part of said first pattern that is seen by said image capture device through said lens;
• obtaining, from said image, a second set of data from at least a part of said second pattern that is seen by said image capture device outside said lens;
• and
• retrieving said at least one optical parameter by using said first and second sets of data and taking account of positions, with respect to each other, of said image capture device, said lens and said first and second patterns.