lecture 12: temporal vision

The visual acuity of amblyopic patients is poorer when measured using a Snellen chart than when measured with isolated optotypes because of:

simultaneous masking

What prevents our visual world from disappearing when we fixate an object?

small involuntary eye movements

The CFF for a given percentage modulation is 50 Hz. A stimulus of 55 Hz, presented at this given percentage modulation, is seen as:

steady

The detection of high temporal frequency modulation is limited by:

speed of neural processing

When testing under scotopic conditions, the CFF is expected to be closest to:

20Hz

As the area of a stimulus increases, the CFF

increases

When a mask reduces sensitivity to a previously presented spatially adjacent stimulus, the phenomenon is referred to as:

metacontrast

For a flickering stimulus, as the temporal frequency increases, the rate of perceived flicker:

increases

Temporal resolution improves as the:

c) both b & d

The reduction in sensitivity to low temporal frequencies is caused by:

lateral inhibition

The CFF for scotopic conditions, compared to photopic conditions, is:

lower

When flickering light falls on the retina, nearby retinal blood vessels:

dilate