Why does every thing look slightly darker in my right eye i dont have any other symptoms i also dont take any medication that would effect my i and i didnt have any eye injury?

Asymettrical visual acuity could be due to congenital or peri-natal causation, but also, childhood injuries, or inflammations. A focal mild optic atrophy secondary to problems years ago could be the culprit, for example. To uncover answers, see an ophthalmologist, and obtain a comprehensive exam. Doubt your discovery is indicative of any progressive disorder.