Please provide your email address to receive an email when new articles are posted on . EyePromise announced that macular pigment optical density measurement by heterochromatic flicker photometry has ...

AS is well known, it is difficult to compare the intensities of lights of different colour. We can tell when one is much brighter or much darker than the other, but values obtained for the point of ...

MR. WALSH'S book may be regarded as a useful supplement to pre-War works on illumination. The text may be conveniently divided into four main sections. We have first an account of the effect of light ...