Glossary
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Photosynthesis

Substandes with a higher energy level are produced by photosynthesis by absorption of light energy.
By using sun energy photosynthesis provides building materials and fuel to any living thing.

Phototherapy

In contrast to the lighttherapy phototherapy has no effect on the impression of brightness in the human eye.
This refers to therapies with influence on the skin by optical radiation e.g. treatment of neurodermatitis and psoriasis.
Mostly this happens also with the inclusion of substances which influence the radiation sensitifity, e.g. in the PUVA therapy.