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.
Causes of eye pain fall into two broad categories: ocular pain and orbital pain. 1  Ocular pain is eye pain coming from the pain-sensitive outer structures of the surface of the eye. 2  Orbital pain is described as a deep, dull ache behind or in the eye.