sagittal surface

sagittal surface

[¦saj·ə·təl ¦sər·fəs]
(optics)
A surface containing the secondary foci of points in a plane perpendicular to the optical axis of an astigmatic system.
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To quantify the discrepancies of the final selected configuration, the axial resection (AR), sagittal resection (SR), axial surface (AS), and sagittal surface (SS) results were each sorted into three categories: (1) patellae for which the contact-based plane was within the range of surgeon averages for that specimen, (2) patellae for which this plane was within the overall range of surgeon angles for that specimen, and (3) patellae for which the plane fell outside the range of surgeon input for that specimen.
For Mnemiopsis in a vertical position in the water (at 0[degrees] or 180[degrees]), an approaching directional disturbance (wave or current) is more likely to have a greater impact encountering the broader sagittal surface than the narrower tentacular side, thereby causing an animal to be tilted more often and to a greater extent in the tentacular plane.