Photoreceptor Function and Adaptation

The video tutorial explains the roles of rods and cones in vision, focusing on the dark adaptation curve. It describes how rods are crucial for dark adaptation, while cones are responsible for color vision. The tutorial discusses the threshold changes during dark adaptation, highlighting that rods become more significant over time. It compares dark and light adaptation times, noting that dark adaptation takes longer. The Purkinje effect, where colors appear gray in low light, is also covered.

Which photoreceptor is primarily responsible for color vision?

• Both rods and cones

• Neither

• Cones

• Rods

In the dark adaptation curve, which line represents the total adaptation?

• Green line

• Red line

• Yellow line

• Blue line

What happens to the light threshold as time passes in a dark environment?

• It increases

• It decreases

• It remains constant

• It fluctuates

Which photoreceptor is more active in low light conditions?

• Neither

• Both equally

• Cones

• Rods

After how many minutes do rods become the main players in dark adaptation?

• 20 minutes

• 15 minutes

• 10 minutes

• 5 minutes

How long does it typically take for dark adaptation to complete?

• 30 minutes

• 10 minutes

• 40 minutes

• 20 minutes

What is the approximate duration for light adaptation time?

• 15 minutes

• 5 minutes

• 2 minutes

• 10 minutes

Which adaptation time is generally longer?

• Dark adaptation time

• It varies

• Both are equal

• Light adaptation time

What happens to vision when moving from dark to bright light suddenly?

• Vision becomes sharper

• Vision becomes blurry

• Vision remains the same

• Vision improves immediately

What is the Purkinje effect?

• Colors become more vibrant in dark

• Colors remain unchanged in dark

• All colors appear as gray in dark

• Colors appear brighter in dark