Visualization 1: Losing focus: how lens position and viewing angle affect the function of multifocal lenses in fishes Yakir Luc Gagnon David Wilby Shelby Eric Temple 10.1364/JOSAA.33.001901.v001 https://opticapublishing.figshare.com/articles/media/Visualization_1_Losing_focus_how_lens_position_and_viewing_angle_affect_the_function_of_multifocal_lenses_in_fishes/4917728 Rotational photography of a Roach head demonstrating the loss of central BEPs at oblique viewing angles in a horizontal rotational plane (i.e., a vertical rotational axis). Originally published in JOSA A on 01 September 2016 (josaa-33-9-1901) 2016-09-01 00:00:00 Visualization multifocal lenses focus fishes Rotational photography BEP axis JOSA lens position function josaa Roach head i.e 01 September 2016