The primary source of blue light is the sun. However, it can also come from LED lamps, fluorescent bulbs, computers and smartphones. Blue light has been found to possess several benefits. It is known to elevate the mood, boosting alertness and helping with cognition. Blue light too helps in regulating your sleep and wake cycle. Studies also show that blue light plays a critical role in the development of the eyes and vision of children.
While blue light has all the mentioned benefits, it has its own set of cons. Overexposure to blue light could actually lead to the premature ageing of the eyes. The main effects of blue light are:
1. Retina damage
Extensive exposure to blue light can lead to the damage of retina cells. This causes a myriad of other eye issues such as age-related macular degeneration. Macular degeneration refers to blurred vision at the centre of the visual field or no vision at all.
2. Digital eye strain
Prolonged exposure to blue light can also lead to digital eyestrain. The condition is characterized by difficulty in focusing, irritation of the eyes and soreness. This is usually caused by digital devices such as computers and smartphones.