AstigMATIC: an automatic tool for standard astigmatism vector analysis

Abstract

BackgroundStandardization for reporting medical outcomes facilitates clinical study comparisons and has a fundamental role on research reproducibility. In this context, we present AstigMATIC, a free standalone application for automated standardized astigmatism vector analyses in corneal and intraocular refractive surgeries. AstigMATIC uses a simple graphical user interface (GUI) and allows the simultaneous display and analysis of astigmatism magnitude and axis.ResultsThe software produces the four following standard graphs according to the standards of the Alpins Method; 1-Target-Induced Astigmatism Vector, 2-Surgically-Induced Astigmatism Vector, 3-Difference Vector and 4-Correction Index. Vector means with X and Y standard deviations are automatically calculated and displayed on the corresponding single-angle vector plots (0 to 180°). Data points are entered into a simplified GUI with no need for command line input. The standard graphs can be easily exported as high-resolution TIFF images for figures to use in production and presentations.ConclusionsAstigMATIC software enables the user to easily and efficiently analyze vectorial astigmatism outcomes using the standardized Alpins Method for post-surgical astigmatism. AstigMATIC and the demonstration datasets are available to download from http://www.lasikmd.com/media/astigmatic.

Primary Topography-Guided LASIK: Treating Manifest Refractive Astigmatism Versus Topography-Measured Anterior Corneal Astigmatism

“…Lesser outcomes become significantly more evident in eyes treated on the ACA axis when the manifest refractive astigmatism to ACA axis discrepancy is greater than 20°. Single-angle polar plots generated using the AstigMATIC software 14 to illustrate the target induced astigmatism (TIA) vector, the surgically induced astigmatism (SIA) vector, the difference vector (DV), and the correction index (CI) in refractive astigmatism axis treated (A and B) vs anterior corneal astigmatism (ACA) axis treated eyes (C and D) in the small (SAD) (A and B) and large (LAD) (C and D) axis discrepancy groups, respectively. All vectors were calculated at the corneal plane.…”

“…12,13 Standard Alpins vector graphs, calculated at the corneal plane, were produced with the AstigMATIC software. 14 Postoperative data reported were obtained before any excimer enhancements. Treatments performed using the Contoura-measured ACA axis were compared to those using the manifest refractive astigmatism axis.…”

Rotational Stability of a New Posterior Chamber Toric Phakic Intraocular Lens

“…Goniotrans, a free standalone application (available at https://www.goniotrans.com/), was used to measure the angular position of the pIOL during postoperative visits (Figure 1). A free standalone application was used for vector analysis [11].…”

Primary Topography-Guided LASIK: Refractive, Visual, and Subjective Quality of Vision Outcomes for Astigmatism ⩾2.00 Diopters

“…Standard Alpins' vector graphs were produced with the AstigMATIC software. 13 Ocular residual astigmatism (ORA) was derived using the vectorial difference between the subjective refractive astigmatism and the Contoura-measured ACA. Statistical analyses were calculated using MATLAB R2018a software (Mathworks, Natick, MA).…”

“…Statistical analyses were calculated using MATLAB R2018a software (Mathworks, Natick, MA). 13 Paired sample t tests were used. Statistical significance was set at a P value less than .05 and all data were reported as means ± standard deviations.…”