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Light and Optics Quiz

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Questions and Answers

What is the process of transfer of light energy to a particle or surface?

Transmission

Refraction

Absorption (correct)

Reflection

Why is there no visual sensation at the optic disk?

Because there are no blood vessels in the optic disk

Because it is a point of light focus

Because there are no photoreceptors in the optic disk (correct)

Because it is a blind spot

What is the main function of the aqueous humor in the eye?

To maintain the eye's shape (correct)

To nourish the cornea

To focus light rays

To provide the eye's color

If the cornea has a refractive power of 42 diopters, at what distance behind the corneal surface will parallel light rays be focused on the retina?

0.024 m Signup and view all the answers

Which layer of the retina contains the cell bodies of the bipolar cells, horizontal cells, and amacrine cells?

Inner nuclear layer Signup and view all the answers

What is the main difference between the aqueous humor and the vitreous humor in the eye?

Their viscosities Signup and view all the answers

Which cells in the retina have axons that leave the retina?

Ganglion cells Signup and view all the answers

Where does most of the eye's refractive power occur?

Lens Signup and view all the answers

What is the primary reason for the fovea's pit-like appearance?

Lateral displacement of cells above the photoreceptors in the fovea Signup and view all the answers

What is meant by the term 'duplex retina'?

The presence of both rod and cone cells in the retina Signup and view all the answers

Which of the following is associated with the photoreceptor 'dark current'?

The movement of positive current across the photoreceptor membrane in the dark Signup and view all the answers

What is a key difference between ON-center and OFF-center ganglion cells?

ON-center ganglion cells respond to stimulation of their receptive field centers with a transient burst of action potentials Signup and view all the answers