Well, I recently got contacts, and I noticed that one was way bigger than the other. Both my pupils look like they're the same size, so… Also, for my right eye, I have normal contact lenses and for the left eye, I have toric contact lenses for astigmatism. The left eye with astigmatism is the contact that's bigger. I see clearly with my contacts on with the right eye but not the left eye. I also have slightly different prescriptions for each eye. My right eye is -3.75 and my left eye is -3.50. Do you think it's the prescription or the size that's making my left eye see slightly more blurry than my right?
Read more: Why Do I See Blurry With One of My Contacts?