Wood's lamp

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[Gr. lampein, to shine]
A device for producing and applying light, heat, radiation, and various forms of radiant energy for the treatment of disease, resolution of impairments, or palliation of pain.

infrared lamp

A lamp that develops a high temperature, emitting infrared rays; a heat lamp. The rays penetrate only a short distance (5 to 10 mm) into the skin. Its principal effect is to cause heating of the skin.
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slit lamp

A lamp so constructed that an intense light is emitted through a slit; used for examination of the eye. See: illustration

sun lamp

Ultraviolet lamp.

ultraviolet lamp

A lamp that produces light with a wavelength in the range of 180 to 400 nm. It is used to treat certain skin conditions such as psoriasis or T-cell lymphoma, to promote wound healing by destroying bacteria, and to tan the skin. Ultraviolet lamps produce light within specific ranges: ultraviolet-A (UV-A) lamps generate light having a wavelength of 320 to 400 nm; ultraviolet-B (UV-B) produces light in the range of 290 to 320 nm; ultraviolet-C (UV-C) has a wavelength of 180 to 290 nm. Synonym: sun lamp


Patients and operators must wear ultraviolet-resistant goggles during treatment. Overexposure to ultraviolet light produces burning and blistering of the skin and may predispose patients to skin cancers.

Wood's lamp

Wood's filter.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Diascopy test is negative, which is positive in nevus anemicus and on Wood's lamp examination we can observe an off-white colour.
Experimental design: A total of fifty two (n=52) clinically positive dog skin scraps for dermatophytosis based on clinical signs, microscopic examination of skin or hair and wood's lamp technique were identified as prospective samples for this research.
The coral-red fluorescence seen under the Wood's lamp is due to porphyrins produced by Corynebacterium minutissimum.
Accentuation was observed under wood's lamp. She started tacrolimus 0.1% for 6 months with mild improvement.
Type of melasma was established with Wood's lamp examination.
Comparison of its efficacy was based on colour intensity, demarcation and Wood's lamp reflection score.
This procedure, however, may yield ambiguous results, since other infectious organisms may also glow under the light of a Wood's lamp and some strains of M.
The lesion fluoresces under a Wood's lamp, and a potassium hydroxide (KOH) preparation will be positive, revealing the well-known "spaghetti and meatballs" pattern.
Trichophyton tonsurans does not fluoresce under a Wood's lamp, but M.
Because the spots can be difficult to see in very young infants, the child's skin should be examined with a Wood's lamp. Other findings that should be looked for include skeletal abnormalities such as bowing of the tibia, congenital glaucoma and loss of visual acuity, as well as macrocephaly, he noted.
Melasma is a commonly acquired, localized usually symmetric hyperpigmentation characterized by irregular, light to dark brown patches that occur almost exclusively in sun exposed areas.1 This condition is most common in women accounting for 90% of all cases especially in pregnant women,2 those on hormone replacement therapy or oral contraceptive medications.3 It appears in all racial types but occurs more frequently in those persons with Fitzpatrick skin type IV - VI who live in areas of high ultraviolet radiations; sun exposure deepens these hyper pigmented areas.3,4,5,6 There are three types of melasma, differentiated on the basis of Wood's lamp examination; epidermal, dermal and dermoepidermal.5
Agminated blue nevi and nevus spilus can be differentiated in the clinic by using a Wood's lamp or performing a biopsy, which is not indicated unless atypia is present.