The Effects of Aging on the Amplitude of Convergence

A study was conducted to determine the amplitude of convergence of 98 subjects ranging in age from 20 to 79 years. Three consecutive findings were made the first day, followed by three consecutive findings the following day or shortly thereafter. It was found that the amplitude of convergence was a reliable and repeatable finding. The standard deviation of the convergence findings of the sample was quite high. A statistical analysis was made of the data, utilizing the t test and Pearson r. A statistically‐significant decrease in the amplitude of convergence with increasing age was found. Factors such as decreased accommodative‐convergence and neurological change were theorized to be possible causative factors.