Have your eyes been playing tricks on you? You might want to sit down for this. The Twitter account Unusual Facts has gone certified viral — with more than 70,000 reactions — after posting ...

Have you ever gone to the optometrist for an eye test and were told your eye was shaped like a football? Subscribe to our newsletter for the latest sci-tech news updates. Or perhaps you've noticed ...

Strictly speaking, the normal cornea is not a surface of revolution, since the curve of the horizontal plane is usually less than that of the vertical; but the difference is only regarded as a disease ...

Please provide your email address to receive an email when new articles are posted on . Many patients desire a refractive correction at the same time as cataract ...

Flora Hui works part-time in private practice as an optometrist. Angelina Duan works in private practice as an optometrist. The eye acts like a camera, capturing light through the front surface (the ...