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Articles on Eyesight

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Electronic devices are not, in and of themselves, a source of visual problems. Using these devices inappropriately can interfere with the natural development of the eye, as well as reading and learning skills. Shutterstock

Development of vision in early childhood: No screens before age two

The impact of using electronic devices is critical during the first years of life, both visually and on the cognitive and social development of the child.
A great hammerhead shark’s two eyes can be 3 feet apart on opposite sides of its skull. Ken Kiefer 2/Image Source via Getty Images

Why do hammerhead sharks have hammer-shaped heads?

The first hammerhead shark was likely the result of a genetic deformity. A biologist explains how shark DNA reveals hammerheads’ history.
Fossils of Shuvuuia deserti depict a small predatory creature with exceptional night vision and hearing. Mick Ellison/American Natural History Museum

Nocturnal dinosaurs: Night vision and superb hearing in a small theropod suggest it was a moonlight predator

By looking at the eye bones and ear canals of extinct dinosaurs, researchers show that a small ancient predator likely hunted at night and had senses as good as a modern barn owl.
There is a lack of good clinical research on the advantages of blue-light filtering lenses. (Shutterstock)

There’s no evidence that blue-light blocking glasses help with sleep

Some health products haven’t been tested for the benefits that they claim to produce. Blue-light blocking lenses are promoted as helping sleep cycles, but there is no evidence to support this.
With online learning, children are staring at computer screens for more hours each day. Christopher Furlong/Getty Images

Increasing screen time during the coronavirus pandemic could be harmful to kids’ eyesight

With online learning and social distancing, kids are spending more time staring at screens and less time outdoors. That can put them at higher risk of myopia and serious eye problems in the future.
Laser surgery is performed successfully in 95 per cent of cases but the operation can turn into a nightmare requiring complex treatments because it is a new, poorly documented field in medicine. Shutterstock

When laser surgery turns into a nightmare, the toll can be enormous

Laser surgery is touted as a good way to get rid of eyeglasses, but not everyone is suited for it. Plenty of research should be done before taking the plunge.
Glaucoma is an insidious disease that is sometimes confused with inattention or vision deteriorating with age, yet it can kill your eyesight and leave you blind. Shutterstock

Glaucoma: Vision’s silent killer

Glaucoma is a serious disease which, if left untreated, can cause blindness. A professor of optometry explains the risks, process of diagnosis and available treatments.

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