Harmful Effects of Blue Light


Nowadays, children everywhere spend more than 3 to 4 hrs. on digital devices like TV, computer and mobile.

These digital tools emit blue light which is harmful to kid’s eyes.

A digital lifestyle increases blue light exposure risk

Light is made up of electromagnetic particles that travel in waves. These waves emit energy, which has range in length and strength.
The shorter the wavelength, higher the energy. The length of the wave is measured in nanometers (nm), with 1 nanometer equalling 1 billionth of a meter.
Blue Light has a very short wavelength so produces a higher amount of energy. Studies suggest that, over the time, exposure to blue Light could cause serious long-term damage to eyes.
Blue Light has a wavelength of between 380nm and 500nm; making it one of the shortest, highest-energy wavelength.

Blue Light waves are among the shortest, Because they are shorter, these "Blue" wavelengths flicker more easily than longer, weaker wavelengths.
This kind of flickering creates a glare that can reduce visual contrast and affect sharpness and clarity.
This flickering and glaring may be one of the reasons for eyestrain, headaches, physical and mental fatigue caused by many hours of sitting in front of a computer screen or other electronic devices.
Our eye’s natural filters do not provide sufficient protection against blue Light rays from the sun, let alone the blue light emanating from these devices or from blue Light emitted from fluorescent-Light tubes.

How does blue Light affect the eyes?

Blue Light penetrates deeper into the eye and has the potential to damage retinal structures through photochemical and photo- oxidative reactions in the retinal pigment layer. Short term exposure of blue Light manifests eye fatigue, eye strain and headache whereas long- term exposure may lead to gradual loss of visual function.

Almost all visible blue Light passes through the cornea and lens and reaches the retina. This Light may affect vision and could prematurely age the eyes.

Digital Eye Strain

Blue Light from computer screens and digital devices can decrease contrast leading to digital eyestrain, fatigue, dry eyes. Bad Lighting or how you sit in front of the computer can cause eyestrain. Symptoms of eyestrain include sore or irritated eyes and difficulty in focusing.