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.
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
Padikkal's maiden double, Ravichandran ton propel Karnataka to 689/6
Lucknow (PTI): Skipper Devdutt Padikkal led from the front with a maiden double hundred in first-class cricket as a dominant Karnataka posted an imposing 689 for six, compounding Uttarakhand's misery in their Ranji Trophy semifinal here on Monday.
On another fruitful day for the Karnataka batters, Ravichandran Smaran too helped himself to a fluent century, scoring an unbeaten 121 off 191 balls with the help of 11 boundaries.
Padikkal made a monumental 232 off 330 balls, striking 29 fours and three sixes during his long vigil at the crease.
Resuming at their overnight total of 355 for two, Karnataka started the second's play from where it had left on first evening, with the duo of Padikkal and Karun Nair (60 off 105 balls) stitching together a partnership of 129 runs for the third wicket to continue their team's domination.
ALSO READ: Two courts in Karnataka receive bomb threats, police launch probe
Uttarakhand tasted the day's first success when medium pacer Abhay Negi dismissed Karun with a back of a length delivery that angled away, and the nick was taken by wicketkeeper Saurabh Rawat.
Padikkal, who began the day at 148 not out, continued to play confidently and reached his first-ever double century in 288 balls, with Smaran too looking good at the other end.
However, having added 59 runs with Smaran, Padikkal tried to work a turning Lakshya Raichandani delivery towards fine-leg but only ended up edging it to Rawat behind the stumps, bringing to an end his long stay in the middle amid a round of applause and acknowledgement.
Shreyas Gopal was on his way back for a duck after facing just six, bowled by Aditya Rawat as Uttarakhand seemed to have finally found an opening to get to the Karnataka lower-order at 485 for five.
However, after his captain's dismissal, Smaran found an able ally in wicketkeeper Kruthik Krishna, with whom the the 22-year-old explosive batter added 123 runs for the sixth wicket to further frustrate Uttarakhand.
Krishna's contribution in the stand was a handsome 60 off 103 balls, and his knock was laced with six fours and a six at the Ekana Cricket Stadium.
Off-spinner Avneesh Sudha broke the stand when the ball took a deflection off Krishna's bat to crash on to his stumps after the batter tries to defend it.
Uttarakhand's agony did not end there though, as seamer Vidyadhar Patil (35 batting off 103 balls) too chipped in with the bat, while adding 81 runs in an unbroken seventh-wicket partnership with Smaran.
On the first day, India's Test and ODI specialist KL Rahul (141), in the company of Padikkal, set the tone for Karnataka with a magnificent hundred.
