OCULUS Easygraph 70620 Instruction Manual page 32

Measurement and evaluation system for corneal topography
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Page 32
angular
frequency
m
Z 1,±1 tilt
Instruction Manual Easygraph
Overview of the most important
Zernike polynomials
Z 2,±2 astigmatism
Z 2,0 focus
Z 3,±3 trefoil
Z 3,±1 coma
Z 4, ±4 four-lobed defect
Z 4, ±2 fourth-order astigmatism
Z 4,0 spherical aberration
degree n

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