okay so today we're going to be checking your depth perception otherwise known as stereopsis
or 3d vision, so the first test is the frisby test. i have some plates here and
on one of the plates there is a circle
okay so starting at this distance here can you see a circle on the plate there?
excellent and that's all it is to this test so just close your eyes now, change the orientation
okay can you see a circle there? excellent close your eyes now
okay where is the circle there? excellent close your eyes okay
and what about there? yeah that's a good start so let's make it a little bit more tricky
okay just close your eyes now this is the middle thickness plate same principle so
excellent, just close the eyes now
and do you see a circle on there?
good
close the eyes again
and what about that plate?
excellent okay
okay this is the final plate, thinnest of them all and the most tricky to do okay
okay just look in there you see a circle anywhere? good close your eyes okay
and what about there? close the eyes again
okay do you see a circle on there? yep that's fine thank you
that's the frisby test completed
okay let's move on to the second test now, let's try the TNO test
so you need to pop these red green glasses on for me please
let's have a look
okay before we do anything i'm just going to establish the correct working distance
there. about there, okay so for this plate how many butterflies can you see?
two. can you point to them please without touching the page?
okay next page or plate, how many circles do you see there?
four. okay can you point to the largest one? excellent
okay so for this one we're essentially matching these shapes finding them on here pointing to
them so before we begin i just want you to point to where the cross is on here.
okay and where is the circle?
and the diamond?
the upside down triangle and the square. okay
so this is just a suppression test now
so how many circles do you see on this page? three. and can you point to them please?
good
okay so we have pacman here or we can say we have a piece of cake with a piece missing okay
so i'm going to show you some more cakes with pieces missing, i want you to tell me whether
the piece missing is at the top, bottom, left or right okay and it gets more difficult as we go.
so i'm going to start here. bottom. good and this one. left. and here. top. bottom.
correct okay just do your best here. top
left. correct
i can't see that one. okay let's bring it
up, take as much time as you need and have a guess. left. okay what about this one? right.
okay let's come back to this one again for me, let's have another go
any ideas? okay let's go to the next one because you got this one correct
okay what about here?
right. yep
this one? left
bottom. okay
right okay that's not too bad it is very difficult that one but we got to about here
on this test so that's fine
okay let me have the glasses off you please
okay we're going to move on to the third and final test
okay we need to pop these 3d glasses on please
okay so you've demonstrated stereopsis nicely on the first two tests so this
should be quite straightforward so looking here is a fly can you grab the wings for me please?
that's fine good so coming to this party we have three rows of animals,
on each row one of the animals should be kind of sticking out in
3d. so on row A which animal appears to look 3d or stick out? cat. yep.
row B? the bunny. this one? yes. okay and the bottom? the monkey. this one here? yes. correct
okay so we'll move on to the wirt circles now so we've got nine diamonds each with four circles,
one of the circles on each diamond will be sticking out in 3d okay so do your best at this
distance number one which circle appears to pop out? at the bottom. and the second one? the left.
and three? the bottom. correct four? the top. and five? the top. six? the left. seven? the right
and eight if you can? left. okay nine? the right. excellent that's perfect thank you
i'll take those visors off you and that's all complete thank you