Fig. 3

Assessment of the MOFIE. a A checkerboard pattern as displayed on a screen with a width of 4 mm. b Captured image through the MOFIE at a working distance of 10 mm. Scale bar correspond to 1 mm. c, d and e, show images that were displayed on an OLED screen and captured at working distances of 7 mm (scale bar of 0.5 mm), 10 mm (scale bar of 0.5 mm), 18 mm (scale bar of 1 mm), and 40 mm (scale bar of 2.5 mm). f Captured image of the group 3 lines of a USAF 1951 resolution chart. Scale bar corresponds to 0.5 mm (g) shows a magnified image of elements 2–5, with a line profile of the red (R), green (G), and blue (B) channels. Scale bar corresponds to 250 μm