Some Of You Can See The Invisible

The video explores how some people can see light beyond the visible spectrum due to genetic variations or conditions like aphakia. It explains the process of human vision, the role of photoreceptors, and how certain conditions allow for the perception of ultraviolet and infrared light. The concept of tetrachromacy is introduced, where individuals can perceive more colors due to an extra type of cone in their eyes. The video highlights that vision is subjective and varies among individuals.

What is the main reason some people can see wavelengths of light that are invisible to most?

• They have a special diet.

• They have undergone eye surgery.

• They have certain genetic variations or conditions.

• They use special glasses.

Which part of the eye is responsible for focusing light onto the retina?

• Cornea

• Pupil

• Lens

• Optic nerve

What condition allows some individuals to see ultraviolet light?

• Myopia

• Astigmatism

• Aphakia

• Hyperopia

What is a potential downside of aphakia?

• Increased sensitivity to red light

• Blurry vision

• Inability to see in the dark

• Enhanced color perception

How did scientists in 2014 discover that some people could see infrared light?

• By using special glasses

• Through genetic testing

• By shining infrared laser light into volunteers' eyes

• By observing natural sunlight

What is tetrachromacy?

• A condition where people cannot see colors

• A condition where people have three types of cones

• A condition where people have a fourth type of cone

• A condition where people see only in black and white

How many types of photoreceptors can mantis shrimp have?

• 6 to 10

• 16 to 21

• 3 to 5

• 11 to 15