Figure 3.

Preparation of lens fragment for the indentation tests after laser-induced microbubble experiments. (a) The trephine with a 14 mm internal diameter and the height adjuster were placed into the lens by the guidance of existing microbubbles (red circles). Lens fragment was made by cutting the lens equatorially with a razor blade. (b) Cross-sectional view of lens fragment bounded by the height adjuster (bottom) and the trephine (sides). The indenter for indentation tests was placed above the lens fragment. The indenter was used to measure Young’s modulus of lens fragment at different locations. The diameter of indenter tip (d) was 2.38 mm and the location from the center (S=0) is S.