Read this important information before proceeding further:

These sections are not intended to replace the professional examination and diagnosis by a physician, and they are presented here purely for informational purposes. A mis-diagnosed or improperly treated eye condition can result in a permanent loss of vision, or a permanent loss of function of the eye or visual system. In the case of any eye problem, seek medical attention promptly. This can include emergency room treatment, as well as treatment by a medical physician or eye care provider.