Learn how to protect your vision from the five most common causes of blindness. Experts share prevention strategies that ...

I've seen my fair share of optical illusions, so nowadays it takes a lot to stump me but this baseball player optical ...

While most wild animals have a very limited range of eye colors (usually black, brown, and yellow), wild cats have strikingly colorful eyes.

OT poses a scenario from a locum optometrist. Here, we look at the role of the locum when educating patients and making recommendations about astigmatic contact lenses ...

Researchers have discovered a fundamental mechanism that affects the size of the pupil, namely our breathing. The study shows that the pupil is smallest during inhalation and largest during exhalation ...

Researchers have discovered that breathing affects pupil size, with the pupil being smallest during inhalation and largest ...

Researchers at Karolinska Institutet in Sweden have discovered a fundamental mechanism that affects the size of the pupil, namely our breathing.

Fewer than 10% of adults eat enough vegetables. These are the top 18 healthiest vegetables to add to your diet.

Test your eyesight and colour vision with this fun optical illusion challenge. Spot the hidden number in a colourful circle ...

When a child might not be — when something is wrong, yet no one seems to know what it is — the anxiety is soul-crushing. And ...

Birds-of-paradise are even colorful in the dark, with feathers and body parts that glow a brilliant yellow-green under ...