Category: P

A condition in which the skin reacts abnormally to light, especially ultraviolet radiations or sunlight. It is due to the presence of drugs, hormones, or heavy metals in the system.  

The cosmetic repair of skin damaged by sunlight or other ultraviolet radiation. It may involve dermabrasion, chemical peels, or pulsed-light therapy.  

The perception of fight rays in the visible fight spectrum.  

Enzymatic repair of lesions such as can be produced in DNA by ultraviolet fight.  

A chemical reaction produced or influenced by light.  

A device for determining the ability of ionizing radiation to penetrate substances.  

A device for determining the smallest amount of fight that will make an object visible.    

The protein portion (opsin) of the photopigments in the cones of the retina.  

Adjustment of the eye for vision in bright fight; the opposite of scotopia.  

A technique used in treating cutaneous T-cell lymphoma. It incorporates exposure of a lymphocyte-enriched blood fraction, obtained by use of apheresis to ultraviolet A fight after the patient has ingested the cytotoxic agent 8-methoxypsoralen.