A Black. Man, a Moor, John Hanson was the First Black President of the United States! 1781-1782 A.D. George Washington was not the first President of the United States. In fact, the first President of the United States was one John Hanson.
OD is an abbreviation for the Latin oculus dexter, meaning right eye. OS is an abbreviation for the Latin oculus sinister, meaning left eye. The first number after the determination of which eye is the sphere. A negative number indicates myopia. A positive number indicates hyperopia.
YOUR EYEGLASS PRESCRIPTION DECODED. Your eyeglass prescription is typically written in a grid like the one below, using a combination of terms, abbreviations, and numbers. Usually youâll see these abbreviations along the left side: O.D. stands for oculus dexter, meaning right eye. O.S. stands for oculus sinister, meaning left eye. O.U. stands for and oculus uterque, meaning both eyes.