DSA EXAMINER

[ROG]

Does one have to take the DSA HPT to be a DSA examiner?

[Rick]

Looks like it... clicky

[ROG]

Oh well, thats one more job avenue not possible.

[James]

Why? Are you allergic to the HPT?

[ROG]

Takes me about 3 or 4 seconds of adjusting to see distance images in a STILL picture as it is showing a 3D image on a 2D format. It is how my brain perceives things that are not in REAL LIFE 3D, such as one does when driving. No chance of seeing moving 3D images on a progressing 2D screen such as HPT. Have same trouble when watching TV - unless the camera stays on the same shot for at least 4 seconds, all I see is the foreground.

[SammyTheSnake]

Takes me about 3 or 4 seconds of adjusting to see distance images in a STILL picture as it is showing a 3D image on a 2D format. It is how my brain perceives things that are not in REAL LIFE 3D, such as one does when driving. No chance of seeing moving 3D images on a progressing 2D screen such as HPT. Have same trouble when watching TV - unless the camera stays on the same shot for at least 4 seconds, all I see is the foreground.

I find that interesting to hear, it sounds like you have a vision system worthy of some study

I have a somewhat opposite problem, in that my left eye is pretty shite (so long sighted that it technically focuses *behind* me) and my peripheral vision therefore starts at my nose. Consummately, my binocular vision is somewhat impeded and, in certain circumstances, I find it difficult to judge distance and radial speed (just don't throw anything at my face, I'll not see it coming unless I see you throwing it!) I find the only guaranteed cure is constant motion, which gives me parallax as a reasonable substitute for fully functioning binocular vision! A 2D picture doesn't look much less 3D than the real world for me, as I'm not relying on binocular vision for depth perception as much as most people probably do.

Not being able to see clearly over my left shoulder introduces certain compromises and workarounds when it comes to reversing manoeuvres in preparation for my DSA test, too.

Cheers & God bless
Sam "SammyTheSnake" Penny

[James]

From what I have heard most struggle with it.

[Gareth]

Interesting about the eye problems, puts mine in perspective, since I manage to work around whatever limitations it imposes reasonably well.

I usually describe mine as being partially blind in one eye, but that doesn't really explain it very well. The reality, as described by a number of eye specialists, is sometimes described as a birth cataract in one eye. This means that I cannot focus with that eye, so no binocular vision, but I can sense colour and movement, so although I can't actually 'see' what's off to one side, my brain manages a damn good job of guessing, so much so that I'm rarely caught out.

I find the binocular issue rather interesting, because I've never had it, and most folks can't understand how I manage depth perception. Answer is I can't but I can manage a reasonable facsimile thereof, because things in the distance have a habit of being smaller! So, I guess I'm using 'local knowledge' all the time when I drive! The other thing I suspect about binocular vision is that a baseline of a couple of inches probably isn't that great, so I suspect most people with normal vision actually rely on distant objects appearing smaller, but perhaps to a lesser extent.

[ROG]

Mine is NOT an eye problem. I have just had them checked by experts at my local hospital. My problem is the way my BRAIN perceives the input from the eyes. The neurologist says that I was born with this problem and there is no known remedy.