While genetic mutations cause some abnormalities in humans, many, including diprosopia, are caused by obstacles faced during development. 雖然人的遺傳變異會(huì )導致一些畸形，但是，許多人，包括雙面畸形是由發(fā)育期間面臨的障礙引起的。
Their maturation process is not only important for establishing normal visual functions, but may also underlie the dendritic remodeling of ganglion cells during development. 雙極細胞的成熟不僅對建立正常的視覺(jué)功能很重要，而且可能對神經(jīng)節細胞的樹(shù)突在發(fā)育期間有修飾的作用。
