Sensation: Vision and Hearing

Front

What is sensation?

Back

Sensation is the process that begins when special receptor cells for the senses are activated, allowing us to detect stimuli from the environment.

Front

What is the absolute threshold for human vision?

Back

The absolute threshold for human vision is the minimum intensity of light that can be detected, such as seeing a candle flame 30 miles away on a clear night.

Front

What is the function of the optic nerve?

Back

The optic nerve carries visual information from the eye to the brain, specifically to the part that controls vision.

Front

What is vision?

Back

Vision is the perception of light emitted or reflected from objects in the environment.

Front

What is the lens of the eye?

Back

The lens is a spherical structure behind the cornea that focuses light onto the retina.

Front

What is perception?

Back

Perception is the process of interpreting and organizing sensory information to understand the environment.

Front

What is the difference threshold?

Back

The difference threshold is the minimum difference in stimulation that a person can detect 50% of the time.

Front

What is adaptation in sensory processing?

Back

Adaptation is the process by which our sensitivity to a constant stimulus decreases over time.

Front

What is habituation?

Back

Habituation is a decrease in response to a stimulus after repeated presentations.

Front

What is the cornea?

Back

The cornea is the transparent front part of the eye that covers the iris and pupil and helps to focus light.