"accuracy" function. For spherical equivalent and astigmatism
The most important outcome of refractive surgery is the refraction, therefore with the Accuracy plot you can create a scattergram of the attempted refractive change vs. the achieved refractive change for each eye if you are analyzing the Spherical Equivalent (Figure C from the nine standard graphs) or The Target Induced Astigmatism versus the Surgically Induced Astigmatism if you are analyzing astigmatism data (Figure G from the nine standard graphs).
This function calculates the standardized Graphs C and G detailed in the Journal of Refractive Surgery(1) from a two column matrix. Columns should contain:
- For spherical equivalent analysis. Attempted in the first column and Achieved in the second.
- For astigmatism analysis. Target in the first column and Induced in the second.
- accuracy(SEQ,3,-11,0,'en',0) For spherical equivalent.
- accuracy(AST,3,0,5.5,'en',1) For astigmatism.
Below you have the help of the function. For more information about "refractiveAnalysis" Toolbox please Contact the author.
% Computes the Accuracy of Achieved versus Target refraction. Either for % spherical equivalent or Astigmatism (Target versus Induced). % % DESCRIPTION % % Computes the Figure C or G from the standard of the JRS (1) % % PARAMETERS % % A Two columns matrix % In Spherical Equivalent [Attempted, Achieved] % In Cylinder [Target, Induced] in positive notation % % month Number of months after surgery % % language Language for the labels 'es' for Spanish or 'en' for English % % type 0 - for spherical equivalent and 1 - for astigmatism % % EXAMPLE % % accuracy(SEQ,3,-11,0,'en',0) % accuracy(AST,3,0,5.5,'en',1) % % VERSION % % 1.0.0 % % demo data "accuracy.mat" % % 1.- Reinstein DZ, Archer TJ, Randleman JB. JRS Standard for Reporting Astigmatism Outcomes of Refractive Surgery. J Refract Surg. 2014; 30: 654–9.