Medically reviewed by Christine L. Larsen, MD Eye crust forms when mucus, oils, and debris accumulate, often during sleep.

Medically reviewed by Johnstone M. Kim, MD Red eyes are caused when blood vessels in the sclera (white part of the eye) swell ...

eye pain headache red or watery eyes changes in the shape of the pupils vision changes People with these symptoms must seek immediate help, as these conditions can cause permanent vision loss ...

If you have eye pain, redness, blurred vision, or light sensitivity, be sure to see an eye doctor for a complete exam, and get treatment early to avoid complications.

If your doctor has prescribed this medication, use it as directed. Use this medication in the affected eye(s) as directed by the product package or by your doctor, usually once or twice a day.

For decades, red light therapy has been an adjunct treatment for numerous ailments. But it may not work for all the medical conditions that supporters say it does.