Page:Latency of Pupillary Reflex to Light Stimulation and Its Relationship to Aging.djvu/10

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Our sample consisted of 86 persons ranging from 14 to 67 years of age (Table 1). The average latency period in these subjects

was 0.252 second, with a range from 0.214 to 0.314 second (Figure 7). It should be noted that the true latency periods are somewhat shorter than the values indicated in this communication. The latency period as determined in this experiment was the time interval from the start of stimulation to the moment when pupillary contraction had reached a speed of 3.5 mm. per