The effect of age upon colour vision. II. Changes with age in light transmission of the ocular media.

Abstract Data on colour-matching and the relative luminous efficiency of selected spectral wavelengths are given for some 400 observers. Both sets of data are found to be significantly correlated with observer age. The results have been compared with the effects of known and postulated age-changes in light transmission through the ocular media. It is concluded that the lens is the principal source of the observed age variations and the results also show that the macular pigment is not a significant variable with age. Finally, evidence is given which suggests that light-scattering may be the main physical cause of age-changes in light-transmission properties of the ocular media.