Both eyes, particularly the right, are always red. Although the I'm experiencing little to no irritation, the redness persist. Two years ago, a doctor told me that they [eyes] only appear to be tired. I do have problems getting a good night of sleep. The redness deminishes only slightly when i'm well rested. Eye drops (visine, opacon, etc.) help but extended use seem to only worsen the condition. I've never smoked, drank alcohol, did drugs, and I don't work around chemicals. What can cause the veins on the surface of my eyes to become enlarged?