Originally Posted by Zen Scanner
Originally Posted by blackcat
When kids have eyes that aren't aligned, they have no depth perception.

Just want to clarify that when eyes aren't aligned or aren't coordinated, there is not a complete lack of depth perception. People like myself who are born or develop very early eye coordination issues use many other coping mechanisms like lens muscle contraction feedback, relative sizing, lighting queues, ground position, shadows, trajectory, etc. to draw our 3d worlds. The mechanic missing is parallax vision which is awesome for small and faster moving things, areas that give me much more difficulty.

When there is a traumatic disruption to someone that has already gone through their critical development period (1-2yrs old) with coordinated parallax vision, then I'd expect very vivid results as you've described.

How do you do on the depth perception tests at the eye doc? Can you still see the objects popping out? DS was able to accommodate fairly well, in an amazing amount of time, for instance he didn't have any trouble getting around, going up and down steps, etc. I think that if someone has poor results on the depth perception test, it would make me more suspicious of a convergence problem. If they had great results (esp. a child), I think it would be fairly unlikely. With DS you could tell he was struggling, and had to look at at the items on the test for a while before answering. I'm sure it's not foolproof, but it's one test that can point one direction or the other. If many/most people with no or limited depth perception are still able to do well on that test, then they might as well throw it out.