A "red line" on a white eye can be a normal blood vessel. Some people have prominent normal blood vessels on the surface of their eyes. If this is the case i.e. it has always been there, if there is no discomfort, then there may be nothing to do.
If the red line is new, then it can be a "feeding" blood vessel to a area damaged by sunlight. This is quite common and can be confirmed by your eye doctor.
If the redness is brand new and especially if accompanied by discomfort of discharge, you may be describing pink eye (conjunctivitis) or some other type of eye inflammation. IF this is true, you need to be evaluated by an eye doctor to determine the best type of treatment.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
The opinions expressed in WebMD Communities are solely those of the User, who may or may not have medical or scientific training. These opinions do not represent the opinions of WebMD. Communities are not reviewed by a WebMD physician or any member of the WebMD editorial staff for accuracy, balance, objectivity, or any other reason except for compliance with our Terms and Conditions. Some of these opinions may contain information about treatments or uses of drug products that have not been approved by the U.S. Food and Drug Administration. WebMD does not endorse any specific product, service or treatment.
Do not consider Communities as medical advice. Never delay or disregard seeking professional medical advice from your doctor or other qualified healthcare provider because of something you have read on WebMD. You should always speak with your doctor before you start, stop, or change any prescribed part of your care plan or treatment. WebMD understands that reading individual, real-life experiences can be a helpful resource, but it is never a substitute for professional medical advice, diagnosis, or treatment from a qualified health care provider. If you think you may have a medical emergency, call your doctor or dial 911 immediately.