A randomized, fellow eye, comparison of keratometry, aberrometry, tear film, axial length and the anterior chamber depth after eye rubbing in non-keratoconic eyes

Table 3 Zernike’s polynomials up to the 4th order in cases and controls

Zernike’s Polynomial	Cases			Controls
	P values comparing pre vs. post rubbing			P values comparing pre vs. post rubbing
	WFA front	WFA back	WFA cornea	WFA front	WFA back	WFA cornea
Z⁰ ₀ (Piston)	0.309	0.417	0.220	0.440	0.432	0.220
Z¹ ₁ (Tilt (Prism))	0.164	0.306	0.215	0.605	0.567	0.552
Z⁻¹ ₁ (Tilt (Prism))	0.257	0.336	0.229	0.339	0.275	0.401
Z² ₂ (Astigmatism)	0.001	0.317	0.003	0.678	0.244	0.515
Z⁰ ₂ (Defocus)	0.315	0.351	0.282	0.453	0.349	0.560
Z⁻² ₂ (Astigmatism)	0.902	0.824	0.934	0.720	0.692	0.630
Z³ ₃ (Trefoil)	0.772	0.238	0.973	0.699	0.653	0.586
Z¹ ₃ (Horizontal Coma)	0.070	0.273	0.088	0.282	0.365	0.253
Z⁻¹ ₃ (Vertical Coma)	0.344	0.166	0.308	0.520	0.641	0.496
Z⁻³ ₃ (Trefoil)	0.813	0.909	0.857	0.869	0.566	0.754
Z⁴ ₄ (Quadrafoil)	0.157	0.861	0.176	0.342	0.853	0.399
Z² ₄ (Secondary Astigmatism)	0.193	0.404	0.226	0.257	0.132	0.357
Z⁰ ₄ (Spherical aberration)	0.230	0.071	0.191	0.716	0.845	0.689
Z⁻² ₄ (Secondary Astigmatism)	0.430	0.809	0.467	0.591	0.848	0.565
Z⁻⁴ ₄ (Quadrafoil)	0.828	0.057	0.530	0.774	0.594	0.840

ISSN: 2326-0254