Depth perception

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Dr Jeff

Depth perception

Post by Dr Jeff » Fri Oct 12, 2018 2:03 pm

Employee did not pass visual acuity testing and sent to opth for formal exam. Vision corrected to 20/30, but a comment was made regarding the fact that he lacks depth perception. Couldn't find any guidance. Would this be a disqualifier?


Re: Depth perception

Post by Daveinfo123 » Fri Oct 12, 2018 2:50 pm

Depth perception (in this case, I suspect stereopsis was tested instead, ie using two eyes to fuse the images into a 3D image) has no requirement for DOT certification. I did not go back and look at any MRB or MEP statements.
As targets get bigger and further away, stereopsis is less useful (deciding if the back of your trailer is close to the dock) than something small such as replacing a fuse. Realize when a driver uses their mirrors, stereopsis goes away because the image is 2D and they use other cues for depth perception.

Interestingly, we used to be very concerned about depth perception in boom operators (guys who do air to air refueling)... but current trends in European Air Forces are to use a flat screen video tool which again is 2 D so stereopsis may be overrated (depends on circumstance.)
Lots of causes of poor stereopsis such as amblyopia, anisometropia, and intermittent fixation.

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