King didn't get radicalized by the urban riots of the 1960s or Vietnam; he was already a radical, says Thomas Jackson, author of From Civil Rights to Human Rights: Martin Luther King, Jr. and the Struggle for Economic Justice..
Here are the definitions of the symbols/abbreviations used in a typical contact lens prescription: 1  Eye - Which eyes the prescription line item is for. 2  SPH - Sphere (this can also be referred to as Power or PWR) 3  BC - Base Curve (usually a number between 8 and 10)  DIA - Diameter (usually a number between 13 and 15)
This article will help to explain the confusing details of your contact lens prescription to you. Eye care professionals use standard terms, abbreviations, and measurements to write out prescriptions for patients needing contact lenses.his stands for base curve. Itâs the back curvature of your contact lens, which is measured in millimeters. For best fit, comfort, and eye health itâs prescribed to match or complement the curvature of your cornea. The lower the number, the steeper your cornea.