"differenceVA" function. Difference between uncorrected and corrected visual acuity

This function computes the Efficacy by means of a plot of lines difference between corrected and uncorrected visual acuity according to the Standard for Reporting Refractive Outcomes of Intraocular Lens–Based Refractive Surgery. 

This function calculates the standardized graph from a matrix of data of two columns First column should contain the visual acuity without correction after surgery and the second column the visual acuity with correction after surgery.

In the case of procedures with multifocal intraocular lenses, the function allows to modify the labels depending on whether the data entered correspond to results of far visual acuity, intermediate or near.

Examples:

Cataract surgery:

  • differenceVA(VA,1,'en','far'); Computes the figure for 1 month after cataract surgery for visual acuity at far distance.
  • differenceVA(VA,1,'en','intermediate'); Computes the figure for 1 month after cataract surgery for visual acuity at intermediate distance.
  • differenceVA(VA,1,'en','near'); Computes the figure for 1 month after cataract surgery for visual acuity at near distance.

Below you have the help of the function. For more information about "refractiveAnalysis" Toolbox please Contact the author

%   Computes de Efficacy by means of a histogram of lines of difference
%   between postoperative uncorrected and corrected visual acuity
%
%   DESCRIPTION
%
%   Computes de Figure B from the standard of the JRS
%   Reinstein DZ, Archer TJ, Srinivasan S, et al. Standard for Reporting Refractive Outcomes of Intraocular Lens–Based Refractive Surgery. J Refract Surg. 2017; 33: 218–22. 
%
%   PARAMETERS
%
%   VA   Two columns matrix
%        In Catarat Surgery with IOLs [UDVA CDVA]
%
%   month       Number of months after surgery
%      
%   language    Language for the labels 'es' for Spanish or 'en' for English
%
%   distance    'far','intermediate','near'
%
%   EXAMPLE
%
%   differenceVA(VA,1,'en','far')
%
%   VERSION
%   
%   1.0.0
%   demo data "efficacy.mat"

Referencias

  1. Reinstein DZ, Archer TJ, Srinivasan S, et al. Standard for Reporting Refractive Outcomes of Intraocular Lens–Based Refractive Surgery. J Refract Surg. 2017; 33: 218–22.