Analog Input. In this example we use a variable resistor (a potentiometer or a photoresistor), we read its value using one analog input of an Arduino or Genuino board and we change the blink rate of the built-in LED accordingly. The resistor's analog value is read as a voltage because this is how the analog inputs work.
For the Haigis formula, the a0 constant moves the power prediction curve up, or down, in much the same way that the SRK/T A-constant. The a1 constant is tied to the measured anterior chamber depth and the a2 constant is tied to the measured axial length.
Any polynomial written in standard form has a unique constant term, which can be considered a coefficient of x 0. In particular, the constant term will always be the lowest degree term of the polynomial.This also applies to multivariate polynomials.as a constant term of â4, which can be considered to be the coefficient of x 0 y 0, where the variables are become eliminated by exponentiated to 0 (any number exponentiated to 0 becomes 1).