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Table 2 Centration parameters of the human eye reported by various research groups

From: Centration axis in refractive surgery

Parameters

Pande et.al. [ 3 ]

Erdem et al. [ 26 ]

Chan CC et al. [ 28]

Yang Y et al. [ 54 ]

PC from VA (mm)

0.75 (max) 0.34 ± 0.20 temp

-

-

-

CR from VA (mm)

0.62 (max)0.021 ± 0.16 nas

-

-

-

GCC from VA (mm)

1.06 (max)0.55 ± 0.22 temp

-

-

-

PC to CR (mm)

-

Pho0.336 ± 0.181 (temp)

Mes:0.345 ± 0.195(temp)

Dil:0.339 ± 0.170 (temp)

Pre-op:0.34 ± 0.24 (nas)

1 D post-op: 0.10 (temp)

3 M post-op: 0.07 (temp)

 

Mean magnitude of PC shift (mm)

-

Mes to Pho: 0.084 ± 0.069

Pho to Dil: 0.149 ± 0.080

Mes to Dil: 0.102 ± 0.104

-

Mes to Pho: 0.133

  1. Dil: pharmacologically dilated conditions; Mes: mesopic; Pho: photopic; PC: entrance pupil center; GCC: geometrical corneal center; CR: coaxially sighted corneal reflex; VA: corneal intercept of visual axis; temp: temporal; nas: nasal; D: day; M: month.