– Hi, my name is Jacob.
I’m a medical student at
the University of Michigan
Kellogg Eye Center.
Today I’ll be showing
you how to build your own
model eyeball that you can use to practice
indirect ophthalmoscopy instantly.
It’s a very simple model.
It’s made out of a ping pong
ball, some tape, some marker.
I use a modified coat hanger
to put it on to the…
Like so.
It’s very simple, it’s very cheap.
It may not be pretty,
but it gets the job done.
At this stage in your training
as a medical student
going into ophthalmology,
it’s very important that
you practice your dexterity
and visual spacial orientation.
That way when the time comes
to see your own patients
and make your own diagnoses,
you’ll be much more comfortable
with your physical exam.
So let’s go ahead and get started.
You will need a ping pong ball,
a box cutter or sharp knife,
a nail, a marker, a lighter,
some tape, a wire coat hanger
and a wire cutter/pliers.
(classical music)
Hopefully that wasn’t too bad.
Just a few more things.
When you want to practice
indirect ophthalmoscopy,
tape a very small piece of
cardboard to your model eyeball.
Now you have a base.
You can put it on any tabletop
or countertop and practice.
One thing I really like to do
and you may have seen it in the video
is I paint every quadrant
a different color.
This allows me to better conceptualize
how the lens inverts the image.
By that I mean I look at
it with and without a lens
and I notice how the positions change.
One other thing you can do
is add 3D features to it.
An optometrist here
recommended I add red string
to the surface to simulate blood vessels.
Although they’re clearly
not blood vessels,
what it does is it offers me
different planes to focus on.
I can focus on the eyeball,
I can focus on the string
and I can focus on the adhesive.
Three different planes.
It’s very good practice.
I would encourage you to do that
for the back of the eye as well.
Either way, get creative,
try different things
and challenge yourself.
Have a good time.
Thank you.
(classical music)

M-Eyeball How-To: DIY Model Eyeball for Medical Students

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