Given below is an online color blind test to know whether you suffer from color vision deficiency or not. This Color vision testing is based on the Ishihara Test for color blindness. Color blindness ...

Astigmatism affects the shape of two parts of the eye: the cornea, the transparent layer at the front of the eye; or the lens ...

If you have astigmatism, your vision may be blurry and distorted instead of sharp and crisp. In astigmatism, the cornea (the ...

An eye doctor recently took to Reddit for an 'Ask Me Anything', explaining there are a number of things they can spot during ...

As a result, the image does not focus at a single point. Patients experience astigmatism as blurring of vision, often with streaks of light in dark conditions. Depending on the axis, astigmatism ...

After daylight saving time ends, driving in the dark can increase hazards. Try these tips to help you see better and drive ...

The test involves presenting a subject with images of inkblots; the person then describes what they see in these blots. The test can purportedly assess personality, emotional functioning ...

This image is shot at infinity to test far-field lens performance. NOTE that this image cannot be directly compared to the other "house" shot, which is a poster, shot in the studio. The rendering ...

Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio products, ...

Apart from being used to remove or prevent cataracts, this procedure can correct long sightedness, short sightedness, ...

I've been writing about computers, the internet, and technology professionally for over 30 years, more than half of that time with PCMag. I run several special projects including the Readers ...

As a longtime lens and camera reviewer, I spend so much time looking for perfect sharpness, sometimes I forget that making images should ... The Twist 60 optic uses astigmatism, an optical defect ...