Blue light is a part of the light that is found in the visible light spectrum that can be seen by the human eye. It is present in natural sunlight, and it is also emitted by electronic devices such as computers, smartphones, tablets, and LED lighting.

While blue light is not inherently harmful, excessive exposure to it can have negative effects on the body. Blue light has been shown to affect the body’s natural sleep-wake cycle, or circadian rhythm, which can lead to difficulty falling asleep and poor sleep quality. In addition, blue light has been linked to digital eye strain, which may cause symptoms such as dry eyes, headaches, and fatigue.

Types of Blue Block Lenses

It’s important to know that not all blue light protection lenses are created equal, and the level of blue light protection they provide can vary widely. Generally, blue light protection lenses can be categorized under two distinct categories:

1. Lens Material: These lenses are made from materials with built-in blue light absorbing properties.
2. Applied Coating: These lenses filter blue light through the special coatings applied to them.