In the last update of RSG you can see the corneal SIA of each eye. You could see the centroid values pre-op and post-op but now you can also see the individual SIA of each eye, the centroid value of the SIA and the axis of the standard deviation of x and y. In this new graphics you can click on a single eye to see more information or click and drag around some point to get the table of those points.

The following graphics shows the same eyes with both types of graphics available in RSG.

 RSG41

RSG42

You can test RSG here.


 

In the last update for RSG I have included the SIA consistency. Up to now you could get your SIA but there was no measure about its consistency, you got an ellipse with the standard deviation (sd) of x and y in the graphic but it was not quantified and when subdividing per factor not even the ellipse. Now you got to the left the mean SIA for the cornea and the SIA sd, if you choose to separate the graphics by factor you get within each graphic the number of eyes, mean and sd of the SIA for each factor. That SIA sd represents the radius in diopters of the circle with the same area as the ellipse in diopters which is easier for interpretation.

The update is online and you can try it here.

SIA.SD


 

Exploring the Eurostat database I found an interesting dataset called Physical and sensory functional limitations by sex, age and educational attainment level. The limitations are categorized for Seeing, Hearing and Walking. I downloaded the data, subset the Seeing limitation and made a little program to explore it. As expected, the lower the education level and the older the people are the more limitations they have. For sex men have less visual limitations that women. You can also compare the total visual limitations between countries, the program is here.

 visual limitations