larger, and the design of the improved tear contour allows better
force distribution (Marks et al., 2012; Schreib and Liebmann, 2011).
Furthermore, the correlation between tear tab size and subjective
force required highlights the patients' perception of applying less
force to a long tab than to a short one. This finding agrees with the
results of previous studies (Dittrich and Spanner-Ulmer, 2010;
Marks et al., 2012; Schreib and Liebmann, 2011). Our results
emphasize that the technical optimization process has been
successful.