The change on the spherical equivalent with time
Updated on version: 1.0.0

stability

In laser refractive surgery procedures it is important to control the stability of the postoperative refraction with time. For this purpose, the standard proposes a stability graph that shows the variation of the postoperative spherical equivalent at different follow-up visits through the mean and standard deviation of the sample.

EXAMPLE PLOT:

The change on the spherical equivalent with time

DESCRIPTION:

This function calculates the standardized Graph E detailed in the Journal of Refractive Surgery(1) from a multiple column matrix. Columns should contain:

  • The preoperative spherical equivalent in the first column.
  • As many columns more as follow-up visits have been conducted. The standard suggests 2 weeks, 1 month, 3 months, 6 months and 12 months but the function can report the number of months specifically measured in your project.

REFERENCES:

  1. Reinstein DZ, Archer TJ, Randleman JB. JRS Standard for Reporting Astigmatism Outcomes of Refractive Surgery. J Refract Surg. 2014; 30: 654–9.

Online Course

How to obtain the Toolbox?

The Refractive Analysis is an Open Source Toolbox for Matlab developed by Rodríguez-Vallejo M for the Analysis of Vision Science Results. It is freely available for the students of our online course but you need the Matlab software to use it. Matlab software is not provided with the course.

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The course is asynchronous which means that it has no start or end date. The student can register whenever he wants and view the materials at his own pace.

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Will I have a certificate once I finish the course?

When you complete the visualization of all course materials, Udemy will provide you a certificate of course completion. You will not have to take any tests to obtain this certificate, only complete the viewing of the materials.

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