Objective: To examine the association of ADHD and LD with visual impairment, uncorrected refractive error, and refractive error (myopia, hyperopia, and astigmatism ...

Nearsightedness, or myopia, is an eye problem that causes objects at a distance to appear blurry. A nearsighted person can see things close to them but have a hard time focusing on objects far away.

The next number on your prescription is the cylindrical correction or CYL. This concerns how much of an astigmatism you have. Astigmatism occurs when the cornea or lens of the eye is more curved ...

Posted to the World Meteorological Organization's Facebook page as well as other social media sources, the photos show a massive lenticular cloud perched atop Mount Etna on June 14. SEE ALSO ...