Normal Interpupillary Distance Values in an Iranian Population

Purpose: to report normal interpupillary distance (ipd) values in different age groups of an iranian population.methods:this study was performed on 1,500 randomly selected subjects from 3,260 consecutive out-patients with refractive errors referred to farabi eye hospital, isfahan,iran over a period of two years (2008 to 2010). measurement of refractive errors and ipd for far distance were performed using an autorefractometer (rma-3000 autorefractometer,topcon, tokyo, japan).results: mean ipd in adult subjects was 61.1±3.5 mm in women and 63.6±3.9 mm inmen (p<0.001). mean ipd increased 4.8 mm during the second decade, 1.7 mm during the third decade, and 0.6 mm during the fourth and fifth decades of life. conclusion: the observed increase in ipd after the age of 30 years indicates that factors other than skeletal growth may affect this parameter