. Author manuscript; available in PMC: 2019 Nov 1.

Published in final edited form as: Optom Vis Sci. 2018 Nov;95(11):976–985. doi: 10.1097/OPX.0000000000001296

Table 4.

Growth curves using equations 1–3 where T = (age in years – 0.25). Sex = 0 for males and Sex = 1 for females.


	Exponential plus quadratic equations
Refractive Error (SEQ; D)	SEQ = (0.494) + (1.66 * e^−1.75T) + (0.384 T) – (0.0463 * T²) R² = 0.11
Keratometer power (K; D)	K = [42.4 + (0.734 * Sex)] + (1.24 * e^−4.01T) + (−0.167 T) + (0.017 * T²) R² = 0.17
Anterior chamber depth (ACD; mm)	ACD = [3.06 – (0.088 * Sex)] – (0.236 * e^−0.679T) + 0.0343 T) + (0.0049 * T²) R² = 0.29
Lens thickness (LT; mm)	LT = [3.79 + (0.031 * Sex)] + (0.111 * e^−1.21T) + (0.0115 T) – (0.00688 * T²) R² = 0.28
Vitreous chamber depth (VCD; mm)	VCD = [13.7 – (0.286 * Sex)] – (1.23 * e^−1.95T) + (0.354 T) – (0.0102 * T²) R² = 0.76
Axial length (AL; mm)	AL = [20.3 – (0.346 * Sex)] – (1.09 * e^−4.18T) + (0.567 T) – (0.0317 * T²) R² = 0.76
Anterior lens radius (ALC; mm)	ALC = [10.4 – (0.292 * Sex)] – (3.14 * e^−1.65T) + (0.129 T) + (0.0333 * T²) R² = 0.81
Posterior lens radius (PLC; mm)	PLC = [5.74 – (0.182 * Sex)] – ([1.10 + (0.124 * Sex)] * e^−1.38T) + (0.102 T) R² = 0.67
Lens power (CLP; D)	CLP = [37.6 + (0.984 * Sex)] + (2.58 * e^−3.21T) – (2.81 T) + (0.170 * T²) R² = 0.84

	Growth and decay equation
Lens equivalent index (IND)	IND = 1.445 + [(0.624 * (1 + T)^2.25)/(100 + (4.3 * (1 + T)^4.13))] R² = 0.23