What is the Significance of WOOD Lamp and 3D Skin CD for the Diagnosis of Vitiligo?

Wood's lamp, also known as blacklight or a UV-A lamp, is used to obtain 320-400nm long-wave UV light through a filter containing nickel hydride. It is one of the common devices for vitiligo examination and diagnosis mainly used to diagnose pigment abnormalities diseases, skin infections, and porphyria. As an auxiliary test for clinical application in dermatology, the use is very wide.

Under Wood's lamp, the melanin absorbs full wavelength ultraviolet light, if melanin decreases, the refraction is strong and light, while melanin increases, the refraction is weak and dark. This is to determine whether the white patches on the patient's skin are suffering from vitiligo.

The Wood lamp can also be used to distinguish vitiligo from other white patches. The skin lesions of vitiligo under Wood's lamp are pure white, contrasting with the surrounding normal skin, with clear boundaries. In contrast, depigmented nevi, white furuncle, tuberous sclerosis, post-inflammatory hypopigmented patches, and hypopigmented patches of leprosy are yellowish white or grayish white under Wood's lamp; lichen planus is brownish yellow or yellowish white; the pale white lesions of anemic nevi are not visible.

In addition, Wood's lamp can also accurately detect the degree of melanin loss in vitiligo lesions, identify complete or incomplete vitiligo, can check the lesions that have occurred invisible to the naked eye

American 3D skin CT has high accuracy and only requires a short time of scanning and imaging to detect keratinocytes, melanocytes, the relationship between dermis and epidermis, and the relationship between blood vessels, which is convenient, fast, and non-invasive compared to biopsy. It can not only distinguish whether the disease is vitiligo but also meticulously analyze the condition of skin lesions and the degree of melanin loss, etc., which provides an accurate and objective basis for the treatment of skin diseases.