+1. The easiest way to tell the difference between ptosis and dermatochalasis (excess eyelid skin) is by lifting the excess skin off of the upper eyelid. If the actual lid margin itself is cutting across the black pupil portion of the eye, then you may have ptosis.
15.1.1 Principal Sum vs. Capital Sum. AD&D benefits are paid through two different methods, though always for a specific amount. Principal Sum; Capital Sum; The principal sum is the stated amount payable as a death benefit if death is due to an accident.
vector sum, resultant-a vector that is the sum of two or more other vectors. radius vector-a line connecting a point in space to the origin of a polar coordinate system. radius vector-a line connecting a satellite to the center of the body around which it is rotating.