E. Kim et al., Performance on the three-point vernier alignment or acuity test as a function of age: Measurement extended to ages 5 to 9 years, OPT VIS SCI, 77(9), 2000, pp. 492-495
The three-point Vernier alignment (or acuity) test was conducted on childre
n from 5 to 9 years old. There is a significant difference between the 5-9
year old subjects and those in age groups 10 to 19 and 20 to 29 years in Ve
rnier performance. These data were also compared with previously published
data from older subjects (up to age 70), We conclude that Vernier function
has not fully matured within the age range of 5 to 9 years; this finding is
consistent with previous results reported in the literature.