Figure 1. Human ocular growth prediction formula in infancy, and early childhood. We described some of the constants and variables in the formula: K is the value of the function for t going towards infinity. The actual value of 23 mm is the presumed axial measure at the age of 13 years, the end point of eye growth. T1 and T2 are time constants related to the exponential growth decay rates (12 weeks and 100 weeks, respectively). k1 (0.73) and k2 (0.27) are empirically chosen numerical weights approached to best fit.