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)
What do the POWER and BC measurements mean on my contact lens prescription? Answer: Before you can get your contact lenses, you will need to go to your optometrist for a professional eye exam. This test will give your optometrist the information they need to identify your contact lens prescription, which is vital for ensuring you get the right lenses for your eyes.