Which part lets you cry when you're sad and makes tears ... light enters the pupil, it hits the lens. The lens sits behind the iris and is clear and colorless. The lens' job is to focus light rays on ...

Researchers at the University of Oklahoma are advancing the fight against inherited retinal diseases (IRDs) with new genetic ...

A remarkable aspect of this technology is its ability to project entirely different images depending on both the wavelength (color) and spin (polarization direction) of light. For example, ...

Researchers have developed experimental contact lenses that use nanoparticles to convert the invisible wavelengths of ...

While most people understand the risks tobacco poses to the lungs or heart, very few realize its silent yet significant ...

A significant proportion of cataract surgery patients exhibit hyperosmolar tear film both before and 1 month after surgery, ...

A team of international astronomers have discovered a new cosmic object emitting both radio waves and x-rays. Astronomers from the International Centre for Radio Astronomy Research (ICRAR), in ...

(CNN) — Astronomers have detected an astonishing celestial object emitting bright flashes of radio waves ... is located about 15,000 light-years from Earth in the same galaxy as our solar ...

Researchers traced long, bright radio pulses, combined with X-rays, to an intriguing cosmic object 15,000 light-years from ...

Vision changes during pregnancy are common; they are usually temporary. But, it is important to know what to expect and how ...