US 12,089,895 B2 · System and method for evaluating a vision of a subject

Abstract

A method of evaluating a vision of a subject including: causing a display to define a first display portion and a second display portion; causing the display to emit, from the first display portion, light having a first wavelength value and to emit, from the second display portion, light having a second wavelength value; causing the display to present, on the first display portion, one or more first optotypes and to present, on the second display portion, one or more second optotypes; varying with time the second wavelength value within a predefined wavelengths range; obtaining an indication concerning a subject's perception of the one or more second optotypes as compared to a subject's perception of the one or more first optotypes; and determining a vision disorder of the subject based on the second wavelength value for which the indication has been obtained.

Claims20

Dependent claims

A system for automatically evaluating a vision of a subject, the system comprising:

a processing unit configured to:
vary with time a second wavelength value within a wavelength range of 400-540 nanometers or within a wavelength range of 560-740 nanometers so as to vary with time a second background color of a second portion of a display and continue causing a first portion of the display to emit light having a first wavelength value within a range of 480-600 nanometers so as to continue causing the first portion to present a first background color;
obtain an input that a subject's perception of second optotypes being presented on the second portion emitting light having the second wavelength value and presenting the second background color is the same as a subject's perception of first optotypes being presented on the first portion emitting light having the first wavelength value and presenting the first background color;
determine the second wavelength value for which the input has been obtained;
and
determine a refractive error for the subject based on the determined second wavelength value.

3 more elements

A system for automatically evaluating a vision of a subject, the system comprising:

a processing unit configured to:
cause a display to define a first display portion and a second display portion;
cause the first display portion to present a background having a first background color, the first background color within a range of 480-600 nanometers;
cause the second display portion to present a background having a second background color;
cause the display to present, on the first display portion having the first background color, one or more first optotypes;
cause the display to present, on the second display portion having the second background color, one or more second optotypes;
vary with time the second background color of the second display portion within a background colors range of 400-540 nanometers or within a background colors range of 560-740 nanometers and continue causing the first display portion to present the first background color;
obtain an input that a subject's perception of the all of the second optotypes being presented on the second display portion presenting the second background color is the same as a subject's perception of all of the first optotypes being presented on the first display portion presenting the first background color;
determine the second background color for which the input has been obtained;
and
determine a refractive error for the subject based on the determined second background color.

8 more elements

Dependencies are inferred from the claim text.

System and method for evaluating a vision of a subject

Life of this patent

System and method for evaluating a vision of a subject

Life of this patent

Abstract

Claims20