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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K'taka Minister demands international status for Hubballi, Belagavi airports after Madurai move
Bengaluru (PTI): Karnataka Infrastructure Development Minister M B Patil on Wednesday expressed displeasure over the Centre declaring Madurai airport as an international airport while not extending a similar status to Hubballi and Belagavi airports in Karnataka, calling the move "discriminatory and unacceptable".
The minister said the central government may have taken this decision keeping the upcoming Tamil Nadu elections in mind.
However, its indifferent attitude towards Karnataka’s demand is questionable, he added.
"The Narendra Modi-led central government has declared Madurai Airport in Tamil Nadu as an international airport but has not taken a similar decision regarding Hubballi and Belagavi airports in Karnataka. This reflects a discriminatory approach and is not acceptable. How can it be butter for them and lime for us?” he questioned in a statement.
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The Cabinet on Tuesday approved the proposal to declare Madurai airport as an international airport.
Madurai is a prominent city in Tamil Nadu, and Union Minister Ashwini Vaishnaw said the decision was taken keeping in view the aspirations of the people of that city.
Patil recalled that a letter had been written on June 24, 2025, to Union Civil Aviation Minister Ram Mohan Naidu, requesting that Hubballi and Belagavi airports be upgraded to international status, as this would greatly benefit the North Karnataka region.
"In this context, Union Minister and Dharwad MP Pralhad Joshi, Belagavi MP Jagadish Shettar, and Haveri MP Basavaraj Bommai should raise their voices and stand firmly for the interests of the State," he urged.
The minister stressed that at least one of the two airports — Hubballi or Belagavi — should be declared an international airport.
"If both are upgraded, it would be even more welcome. The central government must recognise the State’s requirement," Patil added.
