A close-up photograph of what appears to be a light-brown human eyeball shows the organ's expansive, cavernous depths surrounding a seemingly bottomless, black pit that, together, mimics the ...

The new illusion looks simple, showing intersecting grey lines on a white background. But looking closely starts it moving – and though there are actually 12 black ... by your eyes at all.

Read on to get a basic overview of eye anatomy and learn about common eye conditions. The major parts of your eye are listed below. Problems or malfunctions in various parts of your eye can cause ...