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Pregunta 1
Pregunta
If you find it difficult (or impossible) to perceive a clear image of objects located at a distance, but have no problem with close up objects, then:
Respuesta
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Your eye might be too short in length
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You are probably low on aqueous humour
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Your pupil is probably defective
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Your are probably myopic
Pregunta 2
Pregunta
Which of the following is not true of the lens?
Respuesta
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It has curved surfaces
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It is denser than the surrounding media
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It slows light upon entry
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It does the majority of the focusing
Pregunta 3
Pregunta
Which of the following are not found in the human retina?
Respuesta
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Photoreceptors
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Ganglion cells
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Horizontal cells
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Monopolar cells
Pregunta 4
Pregunta
Rods are:
Respuesta
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Absent in certain forms of colour blindness
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Highly sensitive to long-wavelength light
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More numerous than cones
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Concentrated in the fovea
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Responsible for daytime vision
Pregunta 5
Pregunta
The "blind spot":
Respuesta
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Is the location where ganglion cells are most densely packed
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Is absent in phototopic vision
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Is populated by rod photoreceptors
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Cannot be observed
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Is sometimes referred to as the optic disk
Pregunta 6
Pregunta
The optic chiasm:
Respuesta
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Is where the first post-retinal synapses are found
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Is the sight of partial decussation of ganglion cell axons
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Is Y-shaped
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Is where the M- and P-ganglion cell pathways diverge
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