Blue light from digital devices could accelerate blindness
Washington, Aug 13: Blue light from digital devices including smartphones could accelerate blindness, researchers have found.
According to a research by the University of Toledo in the US, exposure to blue light continuously might cause poisonous molecules to be generated in the eye's light-sensitive cells and lead to macular degeneration, Xinhua news agency reported on Monday.
As one of the leading causes of blindness in the US, macular degeneration does not lead to total blindness, but can make daily activities difficult.
"It's no secret that blue light harms our vision by damaging the eye's retina. Our experiments explain how this happens, and we hope this leads to therapies that slow macular degeneration, such as a new kind of eye drop," said Ajith Karunarathne, an assistant professor in the university's department of chemistry and biochemistry.
Macular degeneration is caused by the death of photoreceptors, a kind of light-sensitive cells.
Photoreceptor cells need molecules called retinal to sense light and trigger signalling to the brain, enabling us to see.
"If you shine blue light on retinal, the retinal kills photoreceptor cells as the signalling molecule on the membrane dissolves," said Kasun Ratnayake, a PhD student at the university who was involved in the study.
"Photoreceptor cells do not regenerate in the eye. When they're dead, they're dead for good," Ratnayake added.
To protect eyes from blue light, researchers advise people to wear sunglasses which filter both UV and blue light outside and avoid using smartphones or tablets in the dark.
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Fake notes with 'movie shooting purpose only' written on them send police into tizzy in Sirsi
Sirsi (Karnataka), Apr 8 (PTI): The police in Uttar Kannada went into a tizzy on Tuesday after they found fake currency notes of Rs 500 denomination from a house in Dandeli with 'movie shooting purpose only' written on them.
Based on a tip-off, police searched a rented house at Gandhinagar in Dandeli and confiscated the fake currency notes along with a money counting machine.
Arshad Khan, who is said to be from Goa, was staying as a tenant in the house belonging to Noorjan Jhunjuwadkar, police said.
Police were informed after Jhunjuwadkar noticed that Khan was absent from the house for the past one month.
The fake currency notes had the inscription 'Reverse Bank of India' on them, but did not have the signature of the RBI governor, police said.
The notes were printed on a shining paper with only zeros written in the place of the number, and 'movie shooting purpose only' inscribed on them, police said.
A hunt is on to trace Khan to question him about the seizure, they added.
