Introduction to Eye Anatomy and Visual Processing Quiz

1. What are the 3 specializations of the fovea?

1) Presence of blood vessels 2) Inclusion of upper retinal layers 3) Sparse distribution of photoreceptors (cones)

2. Which 3 pairs of muscles control movement of the eye? What do they do individually?

1) Orbicularis oris and orbicularis oculi control eye movement in all directions

3) Deltoid and pectoralis major control eye movement sideways and diagonally

2) Biceps brachii and triceps brachii control eye movement up and down

The correct pairs of muscles that control eye movement are the superior rectus and inferior rectus, lateral rectus and medial rectus, and superior oblique and inferior oblique as explained in the correct answer section.

Explanation

The correct pairs of muscles that control eye movement are the superior rectus and inferior rectus, lateral rectus and medial rectus, and superior oblique and inferior oblique as explained in the correct answer section.

3. What is the optic disk also known as?

A.k.a. = blind spot

Vision void

Ocular hole

Sight gap

The optic disk is commonly referred to as the blind spot due to the lack of photoreceptor cells in that area of the retina, resulting in the inability to detect light.

Explanation

The optic disk is commonly referred to as the blind spot due to the lack of photoreceptor cells in that area of the retina, resulting in the inability to detect light.

4. Which 2 muscles control the size of the pupil to adjust to different light intensities?

1) Ciliary muscle 2) Zonule fibers

1) Retinal muscle 2) Optic nerve muscle

1) Corneal muscle 2) Lens muscle

1) Iris sphincter (circular)2) Iris dilator (radial)

The iris sphincter and dilator muscles work together to regulate the size of the pupil in response to varying light conditions. The incorrect answers provided do not play a role in controlling pupil size.

Explanation

The iris sphincter and dilator muscles work together to regulate the size of the pupil in response to varying light conditions. The incorrect answers provided do not play a role in controlling pupil size.

5. Rods amplify light by how much? Cones amplify light by how much?

1) Rods = ~10^11 to 10^15; 2) Cones = ~10^1 to 10^5

1) Rods = ~10^5 to 10^11; 2) Cones = ~10^1 to 10^15

1) Rods = ~10^5 to 10^11; 2) Cones = ~10^1 to 10^5

1) Rods = ~10^1 to 10^52) Cones = ~10^5 to 10^11

Rods and cones in the eyes are photoreceptor cells that respond to light. Rods amplify light in the range of approximately 10^1 to 10^5, while cones amplify light in the range of approximately 10^5 to 10^11. Therefore, the correct answer is that rods amplify light in the lower range compared to cones.

Explanation

Rods and cones in the eyes are photoreceptor cells that respond to light. Rods amplify light in the range of approximately 10^1 to 10^5, while cones amplify light in the range of approximately 10^5 to 10^11. Therefore, the correct answer is that rods amplify light in the lower range compared to cones.