关键词: 集合近点, 隐性斜视, 年龄, 筛查, 社区

Abstract: Background　 Patients with receded near point of convergence are often found with heterophoria clinically. Studies about near point of convergence mostly focus on its distribution and its association with age，sex and refractive error，but rarely on its association with heterophoria. Objective　To investigate the near point of convergence and influencing factors in community-dwelling people with corrected-to-normal vision，providing a basis for screening for convergence insufficiency in the community. Methods　In January 2020，197 individuals living in Chunfeng Community，Shenzhen's Luohu District were screened for near point of convergence，far and near heterophoria，refraction and axial length by convenience sampling method. Linear regression was used to estimate the association of near point of convergence with age，refraction，axial length and far and near heterophoria. Bivariate correlation analysis was used to estimate the association of near point of convergence with age and far and near heterophoria. Results　Finally，112 eligible cases with complete data were enrolled，with age，near point of convergence，axial length，degrees of far and near heterophoria，refractive degrees of right and left eyes on average were（36.9±19.9）years，（5.18±4.60） cm，（23.27±1.10）cm，（-0.34±1.78）PD，（-4.79±5.28）PD，（-1.20±2.18）D，and（-1.01±1.98）D, respectively. Multiple linear regression analysis showed age and near heterophoria were associated with near point of convergence（P<0.05）. Near point of convergence was positively correlated with age（r=0.36，P<0.01），and negatively correlated with the degree of near heterophoria（r=-0.20，P=0.03）. Conclusion　Near point of convergence was associated with near heterphoria and age. This study indicates that it is feasible to carry out the screening for near point of convergence in the community.

Key words: The near point of convergence, Heterophoria, Age, Screening, Community