OpenOptix ABO Study Guide - Laramy-K Optical

compared to eye movement to vary the designs hardness for a more comfortable feel
given the patient’s viewing habits. This stands out from the average individual design in
that the variable becomes the research behind what makes the design comfortable rather
than the designs and patient related parameters.
Example of a 1 st Generation Design
The distance can be described as a spherical surface with power (F D ) corresponding to the
distance front surface measured in diopters and the near described as a sphere of power
(F N ) corresponding to the near front surface power, then the corresponding radius of the
lenses can be described as:
r D = 1000/F D
r N = 1000/F N
With the corresponding points fitting into the spherical equation:
x 2 +y 2 + z 2 = r D
2
these equations make the assumption the point (0,0,0) is the point at which the radius
originates to wards a point on the corresponding spheres. Our domain for the distance
could be easily described as above the prism reference point or y>0, and our domain for
the reading could be easily described as y