Change in the angle of vision

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ABSTRACT:

My research question is based on the eye. “Does the change in the angle of vision (from normal to peripheral) effect the time taken to detect motion and color?” It is often seen that people find it difficult to see from the periphery of their eye and I will test this with two very simple and basic experiments. One of the experiments was performed on the computer and the other was performed with the aid of a 30 cm ruler. In the first experiment, which was to detect color, the person had to click the stop button when the color changed and in the second experiment, which was to detect motion, a person would stand and drop the ruler and the other person would catch it. What made this challenging was the fact that it was performed at various different angles of 0°, 30°, 60° and 90° to the left and right side. I took the left side to be -30°, -60° and -90°. Then I had to perform the t-test on the values obtained and then compare the two experiments. What I found was that in most of the cases the angle of vision did affect the vision and that peripheral vision could detect motion better than color. This, I found out, is because of the difference in the t-values between the angles and also by the t-table value. I have also found through this experiment that motion is detected better compared to color. Theoretically and practically, this is because the rods are insensitive to color and more sensitive to movement as the pigment does not absorb color.

1.1: RESEARCH QUESTION:

DOES THE CHANGE IN THE ANGLE OF VISION (FROM NORMAL TO PERIPHERAL) EFFECT THE TIME TAKEN TO DETECT MOTION AND COLOR?

1.2: WHY I CHOSE THE TOPIC?

The human eye has always been a very intricate structure to understand and as a student of biology I have always wished to study the structure in detail. I have sought after finding out how such a small organ can be very vital for a human being and help them in their everyday life as it is estimated that 2/3rd of the information registered in the brain is due to the eye. The eye is a very sensitive organ therefore it is confined in three layers: the sclerotic coat which is the outer most coat and is a tough white layer before the cornea which helps the light to enter in the eye and also bends the rays for focusing, the choroid coat which is the middle layer and has a pigment called melanin which reduces the reflection of the rays and since it forms the layer before the iris it is also responsible for the color of the eye and the retina is the innermost layer of the eye which consist of the rod and the cones which are photoreceptors and are responsible for the images we see.