Effects of brightness variations on a smartphone-based version of Radner reading charts

<p>Each row corresponds to a specific participant while each column correspond to the following measurements:<br> 1&deg; column: Age<br> 2&deg; column: Spherical Equivalent from Autorefractometer<br> 3&deg; column: Spherical Equivalent from Correction in use<br> 4&deg; column: Reading acuity for Radner paper chart<br> 5&deg; column: Reading acuity for smartphone-based high luminance Radner chart<br> 6&deg; column: Reading acuity for smartphone-based medium luminance Radner chart<br> 7&deg; column: Reading acuity for smartphone-based low luminance Radner chart</p>