On 7/30/2016 7:22 AM, Brian Gaff wrote:
Who knows but they annoy the heck out of people with poor vision making
people dazzled and making the effects of cataracts far worse by creating
blooming effects.

Treated cataracts? Or untreated?



My guess is that when coming down they help with seeing the edges of steps
in 3D so to speak but at the expense of making going the other way far more
annoying.

The biggest danger is coming downstairs. If you miss a step going up,
you don't fall far.