My right eye seems out of focus (blurry), but when i cover either my right or left eye, my eyes seem normal. what could possibly be the issue? its very uncomfortable and annoying but i have no idea what i could have done?

Not feasible to be precise, as an evaluation would be needed. Ocular muscle imbalance may explain but other eye problems may be the cause. See an ophthalmologist, get a full exam and decide if a neuromuscular issue is playing a role.

You may have some unbalanced hidden hyperopia which only shows up now in your 40s. Your right eye may be a little more farsighted than your left. Covering your left eye lets the right eye focus fully. You may also have a microtropia, or slight misalignment of your right eye. Allergy with mucus or dry eye can also cause this. See an ophthalmologist in person for a definite answer.