Y Wang1, Y Zhao, Y Ai. 1. Department of Ophthalmology, Qingdao Municipal Hospital, Qingdao 266011, China.
Abstract
OBJECTIVE: To investigate the interpupillary distance (IPD) of Chinese children for stipulating the sizes for children spectacle frames. METHOD: The IPD of 10171 children aged 5 to 17 years old was measured with a caliper in four cities. RESULTS: The IPD was positively correlated with the age increase from 5 to 17 years. The IPD in males was larger than that in females. The differences of IPD between males and females in the age groups of 5 to 9 and 10 to 15 years were statistically significant (F = 400.97, P < 0.01). CONCLUSIONS: There are two peak periods of the growth of IPD in Chinese children at 5 to 9 and 10 to 15 years. The IPD in males reaches adult level at age 15 and in females at age 13. The differences of the IPD between male and female and among 4 cities have no practical meaning in stipulating the sizes of children spectacle frames.
OBJECTIVE: To investigate the interpupillary distance (IPD) of Chinese children for stipulating the sizes for children spectacle frames. METHOD: The IPD of 10171 children aged 5 to 17 years old was measured with a caliper in four cities. RESULTS: The IPD was positively correlated with the age increase from 5 to 17 years. The IPD in males was larger than that in females. The differences of IPD between males and females in the age groups of 5 to 9 and 10 to 15 years were statistically significant (F = 400.97, P < 0.01). CONCLUSIONS: There are two peak periods of the growth of IPD in Chinese children at 5 to 9 and 10 to 15 years. The IPD in males reaches adult level at age 15 and in females at age 13. The differences of the IPD between male and female and among 4 cities have no practical meaning in stipulating the sizes of children spectacle frames.