Here is what those abbreviations mean: O.D.- This is oculus dexter, meaning right eye. O.S.- This is oculus sinister, meaning left eye. O.U.- This is oculus uterque, meaning both eyes. Along the top, you might see different verbiage that generally has to do with measurements related to different aspects of your vision.

When your right eye twitches What does that mean?

Some cultures around the world believe that an eye twitch can foretell good or bad news. In many cases, a twitch (or jump) in the left eye is associated with misfortune, and a twitch in the right eye is associated with good news or future success.

What is a bad eye power?

Generally, the further away from zero (+ or -), the worse the eyesight. A number between +/-. 025 to +/-2.00 is considered mild, a number between +/-2.25 to +/- 5.00 is considered moderate, and a number greater than +/- 5.00 is considered severe. Eye prescriptions can change over time.