Figure 2.

Brewster angle microscopy (BAM) micrographs (500 × 500 µm) of human meibum films obtained in Langmuir trough representative of the designated surface pressure (π) range. It can be seen that at π ≥ 10 mN/m the mucomimetic polymer hyaluronic acid (HA) results in more uniform and thicker (i.e., brighter) meibomian layers (with permission, from Georgiev et al., 2013) [40].