James Thorington

1858 – 1944

$Retinoscopy (or shadow test) in the determination of refraction at one meter distance, with the plane mirror$ Retinoscopy (or shadow test) in the determination of refraction at one meter distance, with the plane mirror
$Refraction and how to refract$ Refraction and how to refract
$Retinoscopy (or shadow test) in the determination of refraction at one meter distance$ Retinoscopy (or shadow test) in the determination of refraction at one meter distance