Q. Which type of photoreceptor allows us to see under low levels of illumination?

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Q. What is the reason for temporary blindness when moving from a darkened room into sunlight?

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Q. Where are the cones mainly concentrated in the eye?

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Q. What is the blind spot in the eye?

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Q. What are the two types of specialized nerve cells in the retina?

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Q. What does visual perception involve?

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Q. Which aspects of visual perception are crucial for the design of visual interfaces?

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Q. How does the visual system interpret images to determine size and distance?

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Q. What does the visual angle represent?

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Q. How is visual angle affected by the size and distance of an object?

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Q. What is the measurement unit for visual angle?

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Q. What is visual acuity?

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Q. How is visual acuity typically measured?

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Q. According to the law of size constancy, what happens to our perception of an object's size as its visual angle changes?

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Q. What cues can be used to determine the relative positions and distances of objects in a scene?

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Q. What is the relationship between familiarity and perception of an object's size and distance?

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Q. What is luminance?

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Q. How does luminance affect visual acuity?

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Q. What is flicker in visual perception?

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Q. How many hues can the average person discriminate?

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