Wavelength dependence of the total scattering cross-section for the scars in Groups 1–3. Multiplication by (λ/550)3 removes the wavelength dependence of the average single fibril scattering cross-section. The straight lines are least squares fits to the data. According to the extension of Benedek’s lake theory, positive slopes indicate the presence of lakes in the distribution of collagen fibrils.10, 12 The slopes are respectively 2.27, 3.87 and 12.8 for Groups 1, 2, and 3 and the R values of the fits are respectively 0.994, 0.997, and 0.997. Increasing values of the slopes represent greater contributions from lakes.