Prevent Blindness, the nation’s eye health and safety organization, declares May as UV (ultraviolet) Awareness Month. Many people are well aware about the damage that UV rays can have on the skin, but most are unaware of the damage it can cause to the eyes.
What is this invisible threat exactly? And how does it impact us? This ultraviolet radiation is measured in nanometers (nm). It is categorized in three basic terms and classified by the strength of the UV ray:
UVC: These rays are below 280 nm. The upper atmosphere absorbs these, so they do not reach us, therefore protection from these rays is not overly necessary.UVB: These are between 315 – 380 nm. These manage to make it to the earth’s surface and are notorious for damaging sight. They can cause snow blindness but are notably responsible for sunburn and several types of skin cancer. Research has shown that these rays are strongest during the summer and at higher altitudes.UVA: These are the most dangerous being 315 – 380 nm. They are known for causing chronic eye damage. Studies have indicated that these rays get absorbed by the lenses of our eyes leading to damage of the …