For more than a century, scientists have understood that three factors control pupil size: light, focus distance, and ...

Virtual reality headsets for visual field testing in glaucoma offer a variety of benefits for the patient, the practice and ...

Researchers have discovered that breathing affects pupil size, with the pupil being smallest during inhalation and largest ...

Mars, Venus, Jupiter, Saturn and Mercury will shine bright enough for the naked eye to see, and you can catch glimpses of Uranus and Neptune with binoculars or a telescope.