What's wrong with ultraviolet lamp irradiation for a long time?

The harm of ultraviolet rays to human body is mainly manifested in:

(l) Effects on skin. Ultraviolet rays with wavelength less than zzonm are almost completely absorbed by the keratinized layer of skin, and ultraviolet rays with wavelength Zponm have the strongest effect on skin and can cause erythema reaction. When exposed to strong ultraviolet rays, diffuse erythema, itching or burning sensation may occur, and blisters or edema may be formed. Common symptoms include headache, fatigue and general malaise.

(2) Damage to eyes. 250~320nm ultraviolet radiation can cause acute keratoconjunctivitis. Mild symptoms include foreign body sensation in both eyes and mild discomfort, and severe symptoms include burning sensation or severe pain in the eyes, as well as high photophobia and tears. Repeated ultraviolet irradiation can cause chronic conjunctivitis, corneal deformation and visual impairment.