Table 2. Statistics of the optical absorption spectral parameters derived with 2^nd order polynomial.

	Retinoblastoma		Uveal melanoma		p-values in two-tailed t-test
	Mean	Standard deviation	Mean	Standard deviation
a2	20	6.8	-3.9	17	0.025
b2	-0.04	0.019	0.014	0.041	0.029
c2	2.1×10−5	1.3×10−5	-9.8×10−6	2.4×10−5	0.035