Visual Perception and Photoreceptors in the Human Eye

What is the visual perception of the light spectrum by the human eye called?

• Sound

• Color

• Texture

• Shape

Which type of photoreceptor is responsible for vision at low light levels?

• Cones

• Rods

• Lenses

• Corneas

What are cones responsible for in the human eye?

• Low light vision

• High spatial acuity and color vision

• Detecting sound

• Producing tears

What do photoreceptors in the retina do when light hits them?

• Turn light into sound signals

• Turn light into electrical signals

• Turn light into chemical signals

• Turn light into thermal signals

How many channels are involved in transmitting color information from the eye?

• One

• Two

• Three

• Four

Which of the following is NOT a channel constructed from the output of the cones?

• Red-green channel

• Blue-yellow channel

• Black-white channel

• Purple-orange channel

What is the term used to describe a person who can distinguish fewer colors due to missing or less responsive color-sensing cones?

• Color deficient or color blind

• Nearsighted

• Farsighted

• Astigmatic

What causes some kinds of color deficiency?

• Anomalies in the number or nature of cones in the retina

• Lack of vitamin C

• Excessive exposure to sunlight

• High blood pressure

What is the purpose of the Enchroma test mentioned in the image?

• To test for color blindness

• To measure visual acuity

• To assess depth perception

• To evaluate night vision

What is the source of color according to the text?

• Natural or artificial light

• Water

• Sound waves

• Heat