Question

Select the correct answer from each drop-down menu. The human eye has three types of cone cells. Damage to any one of the types of cone cells doesn't cause total blindness because of the ________. A person who has a nonfunctional cone type won't be able to identify the ________ of objects.

Answer 1

Damage to cone cells doesn't cause total blindness due to other functioning cone cells and rod cells, and people with a damaged cone type can't see the full color spectrum. Research on unique cases of color blindness might shed light on vision processing. Rod function can be studied in low-light environments where cones are inactive.

Step-by-step explanation:

The human eye has three types of cone cells. Damage to any one of the types of cone cells doesn't cause total blindness because of the overlap in wavelength sensitivity among the cones and the presence of rod cells, which can still provide vision in lower light conditions. A person who has a nonfunctional cone type won't be able to identify the full spectrum of colors of objects because each cone type is particularly sensitive to red, green, or blue light. The different types of color blindness are related to the malfunction of these cones. Studying individuals who are color blind in only one eye or who have different types of color blindness in each eye could greatly enhance our understanding of color vision and the nervous system processing that underlies it.

To study the function of the rods alone, one could conduct experiments in a very low light environment, where cone activity is minimal. This helps to isolate rod function since rods are sensitive to light about 1000 times dimmer than cones and are responsible for night vision.

Answer 2

The human eye has three types of cone cells that are responsible for color vision. If one type of cone cell is damaged or nonfunctional, a person may have difficulty identifying certain colors, but they will not experience total blindness.

Step-by-step explanation:

The human eye has three types of cone cells that are responsible for color vision. These cone cells are sensitive to different ranges of wavelengths and work together to allow us to perceive a wide range of colors. If one type of cone cell is damaged or nonfunctional, a person may have difficulty identifying certain colors, but they will not experience total blindness because the other two types of cone cells can still detect light and contribute to vision.

For example, if a person has a nonfunctional cone type that is sensitive to red light, they may have difficulty distinguishing between red and green objects. However, they will still be able to see other colors and identify the shape and form of objects.