There are a few different ways in which the sun send energy to earth, ultraviolet radiation, which we can't see or feel, visible light and infrared radiation, which we feel as heat, are all parts of the electromagnetic spectrum of solar energy, which is transferred from the sun to earth daily. 

UVA, UVB, and UVC rays combine to make what we consider UV rays. 

UVA makes up around 95% of the UV radiation that reaches the earth. They are the most damaging penetrating deeply into the inner layers of skin causing cancer and premature skin aging changes, including wrinkle formation or crows feet around the eyes (photoaging) 

UVA rays pass through the front of the eye (cornea), affecting the lens and retina. Overexposure is associated with cataracts and macular degeneration. 

UVA penetrates windows and cloud cover.

 

 

UVB rays affect the epidermis, or outer skin, resulting in sunburn, blistering and potentially skin cancer. With our eyes, it damages the cornea, which is the skin of the eyeball, causing painful eye burn (photokeratitis) 

UVC is the most damaging to our skin but is absorbed mainly by the ozone layer.

How does UVR effect my eyes ? 

UV light damages the eyes and the outer skin, from the anterior or external parts of the eye, like the cornea, to the posterior or inner parts of the eye like the lens and macular. 

"UV damage to your eyes can start in as little as 15 minutes," Justin Bazan OD

 Why does ultraviolet exhist? Myopia??

Extended exposure ultraviolet (UV) rays can immediately cause damage to eyes, including photokeratitis, also referred to as a “corneal sunburn.”  UV damage to the eyes may also be cumulative, resulting in the development of cataract or cancer later in life.

 

 How is UV bad for your eyes ?

 

 

UVC

UVC is the most damaging to our skin but is mostly absorbed by the earths ozone layer. 


UVA

UVA make up around 95% of the UV radiation that reaches the earth. They have a longer wavelength penetrating deep into the inner layer of the skin and eye, passing through the cornea affecting the lens and macula. Overexposure is associated with cataracts and macular degeneration. 

UVA is also associated with skin cancer and premature skin ageing changes, including wrinkle formation or crows feet around the eyes (photoaging) 

UVA penetrates windows and cloud cover.

 

UVB 

UVB rays affect the epidermis, or outer skin, resulting in sunburn, blistering and potentially skin cancer. In relation to our eyes, it damages the cornea, which is the skin of the eyeball, causing painful eye burn (photokeratitis) 

UVB is also associated with a number or problems including pinguecula, pterygium (surfers eye) and photokeratitis (eyeburn or snow blindness).