The basic concept remains the same regardless of platform: You take a read-the-eye-chart test at home, and an eye doctor reviews your results to determine if your current prescription is still OK.

By stimulating thousands of individual cone cells, researchers made volunteers see a blue-green color of "unprecedented ...

A device has enabled people to see a new a shade of blue-green, which they say is more intense than any experienced before ...

Five people have been able to perceive a colour never before seen by human eyes, after researchers used lasers and tracking ...

Law enforcement agencies nationwide use the same three tests: eye examination, walk-and-turn, and one-leg stand. The eye examination test, also known as the horizontal gaze nystagmus test ...

Today’s optical illusion challenge is a little different from the daily ones. You need to find at least five differences in ...

Our today’s optical illusion is ready to challenge you to find the hidden number '92' within just five seconds. Surrounded by ...

Blood tests can help a doctor diagnose a variety of health conditions, including infections, anemia, high cholesterol, vitamin deficiencies, organ failure, HIV, cancer, and diabetes. Doctors use ...

If you’re over 60 and your vision has gotten blurry or cloudy, you may have cataracts. It’s a common condition in older adults. With a cataract, your lens becomes cloudy. Your vision gets hazy ...

For the past 15 years, I've been fortunate to test most new-for-the-year compound bows. I've seen fantastic innovations during that testing tenure, from carbon risers to rubber strips separating ...