Laptops and cell phones can transmit a variety of light, with blue light being the most damaging to the eye. Scientists at the University of Toledo may have discovered that blue light from the display may cause macular degeneration, which is one of the leading causes of vision loss in the United States. Ajiska Lunaran, assistant professor of the Department of Chemistry and Biochemistry at the University of Toledo, said in a statement: "Blu-ray can damage our vision and harm our retina."
Macular degeneration is the result of photoreceptor cell death in the retina. The function of photoreceptor cells is to capture visual images and send them to the brain using molecules called retinas. The exposure of the blue light to the retina produces various chemical reactions that never cause damage to the retina.
When these photoreceptors die, our body no longer produces new photoreceptor cells.
Karunarathne and his team also inject other cells of the body, including heart cells, cancer cells and neurons, into the cells of the retina and expose them to blue light, all of which die. "The toxicity of blue light to the retina is common. Blu-ray can kill any cell type," Runarathne said.
This phenomenon is because blue light has a shorter wavelength than other colors and therefore has more energy. The extra energy is the cause of this chemical change leading to toxicity in the retina. "Blu-ray seems to damage retinal cells. It's unclear how much blue light and how long it takes to harm cells, but these injuries are irreversible," Dr. ark Fromer said.
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