According to a long-term research study from the University of Copenhagen, it’s likely that anyone with blue eyes shares a common ancestor. While variation in human eye colour is caused by at least 15 separate genes, mutation in a single gene produces blue, and can be traced to a specific DNA location.

Contact sports are risky, and not being able to see clearly makes them even riskier.

The first LASIK corrective procedure took place in 1992, though the treatment can trace its roots back much farther: to the development of keratomileusis in the 1960s, and the evolution of photorefractive keratectomy (PRK) in the 1970s. Combined, these technologies paved the way for the modern Advanced Custom Wavefront LASIK and All-Laser LASIK procedures.

The scariest eyes in the animal kingdom can be found in jungles dense and dark, in skies gray and tempestuous, and even in oceans murky and deep. These sets of eyes are indeed spooky ones best seen from afar, if at all.

Eye shapes play a crucial role in vision. The eye works by focusing light as it passes through the cornea and the crystalline lens. The light travels through the vitreous humour, a clear gel filling the inside of the eye, and hits the retina at the back of the eye.