Correction on Refraction Error evaluator uses Refraction Correction = 0.0112*Distance between Two Points^2 to evaluate the Refraction Correction, The Correction on Refraction Error is defined as the improvement given against the refraction error. The average refraction correction can, however, be taken as 1/7th of the curvature correction. Refraction Correction is denoted by cr symbol.
How to evaluate Correction on Refraction Error using this online evaluator? To use this online evaluator for Correction on Refraction Error, enter Distance between Two Points (D) and hit the calculate button.