This document discusses visual acuity tests using optical illusions. It explains that visual acuity tests how well someone can see from a distance and determines eyesight quality. Optometrists use optical illusions to test visual acuity, as illusions that make lines or shapes appear different can identify whether a patient perceives the illusions accurately or not. The document presents several optical illusions and explains how optometrists could ask patients what they see to evaluate their visual acuity.

1. Test Of Visual Acuity
By Jeremy Curtis, Bay Halloran, Travis Krickovic, and
Zach Garcia

2. Visual Acuity
Visual Acuity is the clearness of vision. I tests
how good someone’s vision is from a certain
distance.

3. Visual Acuity
Color vision tests can determine whether or not
someone can tell the difference between
different colors. Refraction is used to
determine the clearness of your vision at
different distances, far or close. Visual Acuity
tests in general tests someone’s eyesight
quality.

4. Visual Acuity
Optometrists use visual acuity tests to to
determine the quality of someone’s eyesight.
Military uses illusions as tests and in battle to
distract enemies. NASA uses illusions to
combine multiple images together and make
them appear like they’re a 3D object.

5. Optical Illusions
Here will be a test of one’s visual acuity by
displaying optical illusions to the test subject.
The subject will observe and interpret these
illusions as best they can and results will be
compared to the creator of the illusion’s
explanation to show the subject’s acuity.

6. Optical Illusions
Which middle square is bigger? In
actuality they are both the same
size, but the square on the left
looks bigger because it is
surrounded by smaller squares
rather than larger squares. If you
can tell that the squares are the
same size than that means you
have good visual acuity. Thus this
design will help optometrists test a
patient's vision.

7. Optical Illusion
Which diagonals are longer? They are actually the same size. This illusion is
caused by the difference in shape. If you can tell that the diagonals are the
same size through close examination then you have good visual acuity. If a
patient cannot see how the diagonals are the same then they have bad visual
acuity.

8. Optical Illusion
Is the blue side on the front or the side?
The blue takes up some space on other
sides and can look like it is primarily on
the front or primarily on the side. It is
actually both. If you can see it both ways
then you have good visual acuity.
Optometrists can ask patients what side
they think the blue side is on. If they only
see one way of seeing it then they do not
have good vision.

9. Optical Illusions
What do you see? Four random objects or
something else. It is actually a parallelogram.
These four objects outline a parallelogram so if you
can see the parallelogram then you have good
visual acuity. Optometrists could ask patients what
they see in these shapes to test their visual acuity.

10. Optical Illusions
Which line is longer? They are actually the exact
same length. The circle they are inscribed in make
the vertical line appear longer. Someone with high
visual acuity should be able to see that both lines
are the same length. Asking someone which line
is longer would test their visual acuity with great
accuracy.

11. Optical Illusions
Which side of this figure is the drop on, the left side
or the right side? The drop is actually on neither
side. Some people would look at this and say the
drop is on the left, others would way it is on the
right. Someone who can tell that it is on neither
side has good visual acuity. Optometrists could
ask their patients about this figure in order to test
their visual acuity.

12. Optical Illusions
Studies show that optical illusions test visual
acuity. Since in our optical illusion people with
bad vision do not see it correctly, our illusions
work better than any others.