Fig. 4
From: Image-based quantitative analysis of tear film lipid layer thickness for meibomian gland evaluation
Statistical information of lipid layer thickness over time. a–c relative frequency distribution of each patient’s LLT at selected time points of 0.63, 0.66, and 1.4 s, respectively. d–f per-frame average LLT and standard deviation over the entire image sequence. Selected time points for (a–c) are marked with vertical lines. Patient I has hyposecretory MGD (a, d), patient II has dry eye without MGD (b, e), and patient III has hypersecretory MGD (c, f) (see Additional files 5, 6, 7)