3-27
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e) Topo Fourier function
(Fig.1)
1) Touch the “Fourier Map” button (1) on the Topo view screen to open the Topo
Fourier screen (Fig. 2).
(Fig.2)
2) On the Topo Fourier analysis screen, the constant term is displayed as
“Spherical equ.,” the first order term as “Asymmetry,” the second order term
as “Regular astigmatism,” and higher order terms as “Higher order
irregularity” in the Fourier map display area (2).
3) Individual component values of φ3 mm/φ5.5 mm are shown numerically in
the Fourier index display area (3).
4) Touch the "Kerato" button (4) to open the Kerato view screen and the “Toric”
button to open the Toric view screen.
Touch the “Topo” button (6) to return to the Topo view screen (Fig. 1).
(1)
(2)
(3)
(5)
(4)
(6)
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