Presentations and Age-related Vision Changes

It is well known that people's vision degrades as they age. Imagine you are making slides for a presentation and want to optimize them for an audience with potential vision difficulties.

This script can be used to estimate how an elderly person  might perceive your slides (needs ImageMagick, GMIC). An example slide is shown below.

The script applies a general blur to the slides, a yellow tint to account for yellowing of the lens and reduced color vision. At last, it applies a vignette to account for the loss of peripheral vision.