Chronic red eyes, no medication has helped, got prescribed eye drops and allergy medicine. doesn't see to help. is it allergies or something else?

Red eyes: Some people have very superficial conjunctival blood vessels naturally. These can be temporarily constricted with vasoconstrictor eye drops but the effect is short term followed by an exacerbation of vaso-dilation. Surgical techniques with stem cell implantation is being tried, which is still experimental. Most causes of red eyes are associated with irritants. Common cause is dry eyes.

More info: It could be dry eyes or blepharitis or other cause of red eyes. It says you take synthroid (thyroxine) so a condition called thyroid eye disease could also play a role. I wold recommend frequent lubrication drops (artificial tears) every few hours and if there is no improvement in a couple of weeks then see your eye doctor.