Clarky99 The most important piece of information is that your ophthalmologist (EyeMD) has not found uveitis (inflammation of the uveal layer of the eye [iris, ciliary body, choroid] in your left eye. That being the case, the most common condition that would cause your symptoms is blepharitis (sometimes called by people 'granulated eyelids'). This is a build up of oil and debris along the edge of the eyelids. Skin bacteria often grow in this debris and cause the eye to look bloodshot. It usually requires warm compresses, lid scrubs with a non-prescription eyelid cleaner or use of dilute baby shampoo for the same purpose. If severe, some times an antibiotic ointment is used at bedtime for several weeks to get the condition under control. For severe cases oral antibiotics or steroid containing eyedrops or ointments are cautiously used. The condition is chronic and requires ongoing eyelid hygeine.
There are several other conditions that would need to be excluded. I believe your best advise would be to make an extra appointment with your ophthalmologist to discuss your new concerns about the left eye and let him/her examine you.
JCH MD