83
DISPLAYING THE MEASUREMENT RESULT
(3) Instantaneous Power map
The corneal refractive power is displayed by a local power distribu-
tion.
(4) Corneal HOA map (See "Corneal HOA Map" on page 79.)
(5) RMS display of corneal aberration
Corneal aberration is displayed quantitatively. (See "DESCRIPTION
ABOUT RMS DISPLAY OF CORNEAL ABERRATION" (page 105)
(6) Corneal Index Information on the cornea is displayed quantitatively.
Sim-Ks Shows the refractive power and angle of the flat meridian of 3-mm
area on the cornea.
Sim-Kw Shows the refractive power and angle of the steep meridian of 3-mm
area on the cornea.
CYL Astigmatic axial power
e value Shows the eccentricity indicating the aspheric degree.
* For a perfect ball, e=0; for a shape normally flat in the periphery,
0<e<1.
Q value Aspheric coefficient
ZRI The value which variation in the corneal power in the meridian direc-
tion from a corneal center to the periphery is quantified. Assuming
that a ring exists for the corneal center through the periphery, it is cal
-
culated from the corneal power of each position. Note that the cor-
neal power is calculated with the corneal shape fitted to 6mm sixth-
order Zernike coefficient.
ZAI In order to quantify the symmetry of a cornea, the difference of cor-
neal power between a certain point on the cornea and the point on
the opposite side (180
°) is added in the target area and calculated.
Operation: • When tapped, the image is enlarged. (See "ENLARGEMENT DIS-
PLAY" on page 94.)
• The map scale can be changed. (See "SETTING THE TOPOMAP
SCALE TYPE (TOPOMAP SCALE - TYPE)" on page 149.)
Operation: • When tapped, the image is enlarged. (See "ENLARGEMENT DIS-
PLAY" on page 94.)
• The map scale can be changed. (See "SETTING THE TOPOMAP
SCALE TYPE (TOPOMAP SCALE - TYPE)" on page 149.)
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