An ophthalmic lens includes an optic having an anterior surface with an anterior surface radius of curvature (R1) and a posterior surface with a posterior surface radius of curvature (R2). The anterior surface radius of curvature (R1) and the posterior surface radius of curvature (R2) define a shape factor (X) (where X = (R2-R1)/(R2+R1)) that is greater than zero. The shape factor (X) corresponds to a curve defining shape factor (X) as a function of lens power (P), the curve monotonically decreasing with increased lens power (P).一種眼科透鏡包括光學器件，所述光學器件包括具有前表面曲率半徑（R1）的前表面和具有後表面曲率半徑（R2）的後表面。所述前表面曲率半徑（R1）和所述後表面曲率半徑（R2）限定了形狀因子（X）（其中，X = (R2-R1)/(R2+R1)），所述形狀因子大於零。所述形狀因子（X）對應於將形狀因子（X）限定為透鏡焦度（P）的函數的曲線，所述曲線隨透鏡焦度（P）的增大而單調地減小。
