What is vision defined as in the context of light?

• The ability to hear sounds from the environment

• The perception of light emitted or reflected from objects in the environment

• The ability to feel textures

• The process of producing light

What is the range of wavelengths for visible light?

• 200 to 550 nm

• 300 to 600 nm

• 400 to 750 nm

• 500 to 800 nm

What must light cause in order for our brain to notice it?

• A physical movement

• A sound wave

• A photochemical reaction

• A temperature change

What happens when radiation is below 400 nm?

• It causes a photochemical reaction

• It has so much energy it kills cells

• It only warms the tissue

• It is not detectable by the human brain

What is the effect of radiation above 750 nm on human tissue?

• It kills cells due to high energy

• It causes a photochemical reaction

• It has too little energy to cause a photochemical reaction and only warms the tissue

• It is completely absorbed by the skin

What is the colored part of the eye called?

• Sclera

• Pupil

• Iris

• Eyelashes

Which part of the eye is responsible for protecting it by blinking and is also referred to as the upper eyelid?

• Medial commissure

• Tarsal plate

• Superior palpebral sulcus

• Upper eyelid

What is the name of the corner of the eye where the upper and lower eyelids meet on the side closest to the nose?

• Lateral commissure

• Lacrimal caruncle

• Medial commissure

• Palpebral fissure

What is the term for the small, pink, globular nodule at the inner corner of the eye?

• Pupil

• Tarsal plate

• Lacrimal caruncle

• Sclera

Which structure is indicated by the term "palpebral fissure"?

• The opening between the eyelids

• The white part of the eye

• The ridge above the eye

• The edge of the eyelid