眼睛被晒伤……是一种什么样的体验？

Core Points - The article discusses the condition known as photokeratitis, which is essentially a sunburn of the eyes caused by excessive exposure to ultraviolet (UV) light [4][10][11] - Symptoms of photokeratitis include redness, pain, tearing, swelling, light sensitivity, a feeling of having something in the eye, and blurred vision [1][2][4] - The article emphasizes the importance of eye protection from UV rays, especially in environments with high UV exposure, such as beaches and high altitudes [8][11] Summary by Sections Photokeratitis - Photokeratitis, also known as ultraviolet keratitis, is an inflammation of the cornea and conjunctiva due to UV exposure, leading to symptoms like headaches and temporary vision loss in severe cases [4][10] - Symptoms typically resolve within hours or days, and immediate rest and artificial tears can alleviate discomfort [4][10] Causes and Prevention - UV rays from various sources, including sunlight, tanning beds, and welding arcs, can cause photokeratitis [6][10] - The article highlights the need for protective measures, such as wearing sunglasses and hats, especially during peak UV hours [11][13] Related Eye Conditions - Pterygium, another UV-related eye condition, has a prevalence of approximately 9.9% in certain regions, characterized by a growth on the conjunctiva that can affect vision [10] - Long-term UV exposure can also lead to macular degeneration, cataracts, and even skin cancer around the eyelids [11][10] UV Light Information - UV light is categorized into three types: UVA, UVB, and UVC, with UVB being the most harmful to the eyes [16][17] - Sunglasses labeled "UV400" can block nearly 100% of UV rays, providing essential protection for eye health [13][11]