Ultraviolet (UV) light is a type of electromagnetic radiation that lies beyond the visible spectrum of light. It is invisible to the human eye, but it can have both positive and negative impacts on the body. Therefore, it is essential to understand the advantages and disadvantages of UV rays in order to make informed decisions about exposure. UV rays have been used for sterilization purposes since they can eliminate all types of microorganisms, including drug-resistant bacteria.
This is because UV rays penetrate the cell membrane, destroying DNA and, therefore, preventing its ability to reproduce and multiply. On the other hand, overexposure to UV radiation has a detrimental suppressive effect on the immune system. Sunburn can alter the distribution and function of disease-fighting white blood cells in humans up to 24 hours after sun exposure. Prolonged overexposure to UV radiation can cause even more damage to the body's immune system.
UV light also has beneficial effects on skin conditions, such as psoriasis, as it slows the growth of skin cells and, consequently, reduces symptoms. Exposure to sunlight (i.e., ultraviolet light) can also affect eye tissues, effectively burning them, and causing a condition called photokeratitis. However, many polymers used in consumer goods (including plastics, nylon, and polystyrene) break down or lose strength due to exposure to UV light. Additionally, UV rays accelerate skin aging, as they destroy the collagen and connective tissue that lie beneath the top layer of the skin. In conclusion, UV rays can be both beneficial and harmful depending on the situation. It is important to be aware of both the pros and cons of UV rays in order to make informed decisions about exposure.
