This volume investigates the physiological and cellular consequences of human exposure to longwave ultraviolet (UVA) radiation. Edited by Frederick Urbach, a recognized authority in photobiology and dermatology, the text compiles research from various contributors to synthesize current scientific understanding. It aims to establish a framework for evaluating the risks associated with UVA radiation and to propose evidence-based guidelines for safe human exposure levels.

Experts recognize this volume as a foundational reference for understanding the clinical implications of UVA radiation in dermatology and photobiology. Readers frequently note the technical density of the prose, which is intended for researchers and medical professionals rather than a general audience.