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Wood's Lamp findings refer to the observations made when the skin or the eye is examined under a Wood's lamp. The Wood's lamp is a diagnostic tool that emits long-wave ultraviolet (UV) light that is filtered to reveal fluorescence or distinct color changes in certain tissues or substances.
read more about woods lamp findings ...The primary function of the Wood's lamp is to highlight substances or infections that are otherwise invisible under normal light. The UV light causes specific pigments (like porphyrins produced by certain bacteria) or chemical agents (like fluorescein dye) to glow (fluoresce), allowing the doctor to map the extent of the condition. This is a non-invasive diagnostic technique.
Common ophthalmic uses involve checking for corneal abrasions and retained contact lenses. A fluorescent dye is placed in the eye. When viewed under the Wood's lamp, any scratch or injury on the cornea glows bright green, which helps the eye doctor visualize the damage. It is also used to check for fungal or bacterial infections that fluoresce naturally.
The significance of fluorescence is that it confirms the presence of certain chemicals or cellular damage. The change in color provides immediate, objective evidence of a pathological process, such as fungal infection on the lashes or skin, which appears green-yellow.
Common skin conditions diagnosed include fungal infections (like ringworm), which often fluoresce green. It is also used to differentiate between different types of skin pigment disorders by observing how the light is absorbed or reflected by the skin's layers.
Necessary precautions are to avoid shining the unfiltered UV light directly into the patient's eyes for prolonged periods. The patient is usually instructed to close their eyes when the light is used on the face, or the light is quickly directed onto the specific area being examined.
No, the procedure is painless and does not cause discomfort.
No, the light is long-wave UV, which is filtered and safe for brief examination.
If a fluorescent dye is used, a scratch on the cornea will glow bright green under the light.
A Wood's Lamp is a vital medical tool for identifying "Dendritic Ulcers" caused by Herpes or detecting "Siderosis" from a metallic foreign body. If you feel a foreign body sensation, a doctor will use this lamp to ensure no microscopic shards remain on the eye, which could cause permanent rusting and scarring.
AAO. Slit Lamp and Wood's Lamp (aao.org). 2024.
Mayo Clinic. Eye Exam Procedures (mayoclinic.org). 2024.
StatPearls. Wood's Lamp Examination (ncbi.nlm.nih.gov). 2024.
MedlinePlus. Wood's Lamp Test (medlineplus.gov). 2024.