Now You See It, Now You Don`t!

Report
NOW YOU SEE IT, NOW YOU DON'T!
By. Tyzhane Lamkin
Period: 1
Science Fair 2008- 2009
QUESTION:
To determine if age affects the size
of a person's blind spot size.
OBJECTIVES/GOALS
The object of my project was to
determine if age affects the size of a
person's blind spot.
PROBLEMS & VARIABLES
M.V: Male or Female & Age
R.V: The length of a person’s blind spot
C.V: Age of the different sex
C.V: Ruler to measure the blind spot
= Manipulated variable
= Reponding variable
= Control variable
MATERIAL
1.Rulers
2.Index Card
3.Pencil [Utensils]
4.Timer
5.Log Book
PROCEDURE
1. Set up material
2. Make log with person’s name and info
3. Start timer
4. Observe the time and length of person’s blind spot
5. Repeat steps 2-4
6. Clean up materials
7. Write down what you observe and persons
statement
BACKGROUND INFORMATION
Peripheral vision, or side vision, is the part of your vision that detects
objects outside the direct line of vision. When you look at something, you use
central vision to focus on the details, and peripheral vision to gather
information about the surroundings. For example, your peripheral vision
tells you where to look if someone enters the room, or if a car is approaching
from the side. And as you read these words, you are using central vision to
focus on a word or a few words, and peripheral vision to see where the words
are within the sentence, the paragraph, and the page.
The light-sensitive lining at the back of your eye, called your retina, has
light-receiving cells, called cones and rods. Only the cones are sensitive to
color. Cone cells are most abundant in the central region of the retina, called
the fovea. This region gives you the sharpest view of an object.
Rod cells are better at sensing objects in dim light than cone cells are, but
they are not sensitive to color. Rod cells are also very sensitive to motion, and
are responsible for your ability to detect things moving toward you before you
can focus on them. This characteristic probably had strong adaptive value
during the early stages of human evolution.
In this human biology science fair project, you will investigate the range of
your peripheral vision, and determine how this range is affected by color,
shape, ambient (meaning surrounding) light, and motion.
Hint: Look at
the picture
and see if you
notice
anything
In my project my hypothesis was correct.
HYPOTHESIS
As I determine the size of a person’s blind spot. By
using a ruler and an index card I will identify a persons
length of their blind spot and determine that age do
effect your blind spot.
1.2
1
0.8
Teenage
0.6
Adult
Elderly
0.4
0.2
0
Trial 1
Trial 2
Trial 3
Trial 4
Name
Name
Age:
Length:
Age:
Length:

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