Figure 5.

Average through-focus VA for various amounts of SA with (dashed line, α = 0.3 mm⁻²) and without (solid line, α = 0 mm⁻²) pupil transmission apodization. (a–c) refer to SA values of 0, +0.2, and −0.2 μm for a 4-mm pupil, respectively. The gray dashed line in (a–c) indicates the depth of focus criterion. (d) shows the average through-focus visual benefit in VA of apodization for 0 μm (solid gray line), +0.2 μm (large dashed line), and −0.2 μm (dotted line) of SA. Positive values refer to an improvement in VA due to apodization, whereas negative values refer to a degradation. Error bars refer to 1 SD.