Q- the law as the methodical basis of hygienic requirements to the light-environment

Modern light technicians come to the realization that besides the visual effect the light has non visual effect on eyes and health in general. This leads to the need to revise standards for coverage which should take into consideration not only business interests, but arguments of hygienists and ophthalmologists for the protection of human health from harmful effects of energy saving light sources. For the formation of requirements to the spectral composition of light sources it is necessary to generate a set of hygienic laws defining non-visual effects of light on eye tissues. As a result of the analysis of processes of interaction of light with the eye tissue we formulated the Q-law, which defines photobiological and cyclic processes with the delivery of destructive residues, that create the preconditions for the development of various diseases of the eye. Stability criteria for these photobiological processes and the dependence of the rate of accumulation of destructive residues from the light load of the eye can serve as a methodical basis for identification of additional hygienic requirements to the lighting human environment.