Visual acuity measurement apparatus

A computer program product for measuring visual acuity of a reader, comprising a computer-readable non-transitory storage medium having computer-executable instructions stored thereon, the computer-executable instructions executable to perform:

• displaying a scrolling first line of text to a reader, the scrolling first line of text having an associated first readability vector including an associated first scrolling speed and an associated first font size;
• receiving first signals from an input device wherein the received first signals reflect a first reading performance of the reader when reading the scrolling first line of text;
• determining a first reading score for the reader associated with the scrolling first line of text based on the received first signals from the input device and on the associated first scrolling speed;
• generating a first acuity parameter for the reader, wherein the acuity parameter comprises a first reading index determined based on the first reading score and the associated first font size;
• generating a second readability vector based on the first acuity parameter;
• displaying a scrolling second line of text, the scrolling second line of text associated with the second readability vector including an associated second scrolling speed and an associated second font size;
• receiving second signals from the input device wherein the received second signals reflect a second reading performance of the reader when reading the scrolling second line of text;
• determining a second reading score for the reader associated with the scrolling second line of text based on the received second signals from the input device and on the associated second scrolling speed;
• generating a second acuity parameter for the reader, wherein the second acuity parameter comprises a second reading index determined based on the second reading score and the associated second font size;
• and
• determining a visual acuity of the reader based on the first acuity parameter and the second acuity parameter.

A computer-implemented method for measuring visual acuity of a reader, the method comprising:

• displaying, on a display operatively coupled to a computer, a scrolling line of text to a reader, the scrolling line of text having an associated readability vector including an associated scrolling speed and an associated font size;
• receiving, from an input device communicatively coupled to the computer, signals reflecting a reading performance of the reader when reading the scrolling line of text determining, using the computer, a reading score for the reader associated with the scrolling line of text based on the received signals from the input device and on the associated scrolling speed;
• generating, using the computer, an acuity parameter for the reader, wherein the acuity parameter comprises a reading index determined based on the reading score and the associated font size;
• and
• determining, using the computer, a visual acuity of the reader based on the acuity parameter relative to a reference acuity parameter.