We expose ourselves to various types of light every day; the visible light we see is pretty complex than we think. Every time we look at a computer screen, stare at the mobile phone or other digital devices, go outdoor under the sunlight, we get our eyes exposed to different types of light. These lights can cause numerous effects on your eyes.

Although many people know that sunlight contains both visible and invisible light rays that may cause adverse effects, they are hardly unaware that sunlight contains a variety of color light rays with different energy levels.


Visible blue light consists of highest energy and the shortest wavelengths. These characteristics are associated with both benefits and dangers. Here are certain things you must know about blue light.

  1. You can see blue light pretty much everywhere

The main source of blue light is sunlight. So, whenever you are outdoors under the daylight, you have a greater chance of getting exposed to it. Apart from that, there are various other indoor sources of blue light such as fluorescent lights, LED and flat-screen televisions. Additionally, blue light is emitted via various display screens such as computers, notebooks, and smartphones. Eye specialists suggest that people should reduce their screen time as much as possible.

  1. Human eye isn’t that effective at blocking blue light

The anterior formation of the human eye is capable of blocking UV rays pretty effectively and protecting the ultra-sensitive retina, no matter if you wear sunglasses or not. However, all the visible blue eyes are capable of passing through the cornea and lens until it reaches the retina.

  1. Blue light exposure can maximize the chances of macular degeneration

Because of the very fact that blue light penetrates the cornea and lens, it may damage the light-sensitive cells in the retina. When the eyes are exposed to blue light for a longer period, it might be a cause of macular degeneration; eventually, such condition may lead even to a permanent vision loss.

It is true that more studies are needed to assess the actual amount of damage man-made blue light can cause for retina. Therefore, most of the eye specialists strongly believe that if you spend more time in front of computer screens and smartphones, you are vulnerable to macular degeneration.

Apart from that, blue light exposure can make a significant contribution to digital eye strain too. Shorter wavelengths and higher energy levels have a higher potential to scatter compared to other light types. In fact, when you look at a computer screen for a while, your eyes are exposed to a ‘visual noise’ since they emit a considerable amount of blue light.