This is tricky in the first 2 pics it looks fine visually and the fact the tooth to the right the edges where they meet are different and the gum line issue but the ruler test is not a good indicator unless u also have a level on it because you wont know what straight really is if you pulled gently on the ruler up on to the left they would both touch head tilts and other muscular issues can throw your eye off and change your perception Good Luck Dr. G
