Method and device for evaluating tear fluid layer dynamics

A device for evaluating dynamics of a tear fluid layer, comprising:

• a processing unit;
• and
• a storing unit configured to store a tear fluid layer interference fringe image, which is a moving image or a plurality of static images, wherein the processing unit is configured to:
• acquire color information of each pixel in a predetermined region of a tear fluid layer interference fringe image;
• calculate a numerical value indicating a diversity of color from the acquired color information;
• calculate an average value of the color information;
• and
• calculate a coefficient of variation on a basis of the numerical value indicating the diversity of color and the average value of the color information, wherein:
• the coefficient of variation is used as an index for evaluating the dynamics of the tear fluid layer,
• the color information is luminance or brightness of the pixel, and
• the numerical value indicating the diversity of color is a standard deviation of the luminance or the brightness.

A method for evaluating dynamics of a tear fluid layer, comprising:

• a step of acquiring color information of each pixel in a predetermined region of a tear fluid layer interference fringe image, which is a moving image or a plurality of static images;
• a step of calculating a numerical value indicating a diversity of color from the acquired color information;
• a step of calculating an average value of the color information;
• and
• a step of calculating a coefficient of variation on a basis of the numerical value indicating the diversity of color and the average value of the color information, wherein:
• the coefficient of variation is used as an index for evaluating the dynamics of the tear fluid layer, and
• the coefficient of variation is a numerical value obtained by dividing the numerical value indicating the diversity of the color by the average value of the color information.

A device for evaluating dynamics of a tear fluid layer, comprising:

• a processing unit;
• and
• a storing unit configured to store a tear fluid layer interference fringe image, which is a moving image or a plurality of static images, wherein the processing unit is configured to:
• acquire color information of each pixel in a predetermined region of the tear fluid layer interference fringe image;
• calculate a numerical value indicating a diversity of color from the acquired color information;
• calculate an average value of the color information;
• and
• calculate a coefficient of variation on a basis of the numerical value indicating the diversity of color and the average value of the color information, wherein:
• the coefficient of variation is used as an index for evaluating the dynamics of the tear fluid layer, and
• the coefficient of variation is a numerical value obtained by dividing the numerical value indicating the diversity of the color by the average value of the color information.