Centration axis in refractive surgery

Table 3 A summary of the comparative studies between different centration methods

Study	Laser platform	Sub-group	n	Condition	Follow up	Pre-op MRSE (D)	Post-op MRSE (D)	Res. Ref. (D)	BCVA	Saf index	Eff index
Corneal light reflex
Okamoto et al. [ 38 ]	NIDEK CXIII	CSCLR	268	Myo	1 M	−4.88 ± 1.55	0.17 ± 0.39		-	1.18	1.047
Okamoto et al. [ 38 ]	NIDEK CXIII	LOS	288	Myo	1 M	−5.05 ± 1.63	0.19 ± 0.48		-	1.138	0.997
Wu et al. [ 39 ]	AOV	CLR	60	-	-	-	-	90% within ±0.5 (Astig)	No significant difference (p > 0.05)	-	-
Wu et al. [ 39 ]	AOV	PC	59	-	-	-	-	72.8% within ±0.50.5 (Astig)	No significant difference (p > 0.05)	-	-
Okamoto et al. [ 40 ]	Nidek	CSCLR	317	Myo	3 M	-	+0.123 ± 0.378	-	-	Significantly higher for CSCLR (P < 0.05)
Okamoto et al. [ 40 ]	Nidek	LOS	269	Myo	3 M	-	+0.187 ± 0.480	-	-	Significantly higher for CSCLR (P < 0.05)
Visual Axis
Kermani et al. [ 42 ]	Nidek	LOS	181	Hyp	3 M	+2.46 ± 1.32	+0.19 ± 0.57	64% within ±0.5	92% within 1 line	-	-
Kermani et al. [ 42 ]	Nidek	Visual Axis	64	Hyp	3 M	+2.57 ± 1.26	+0.29 ± 0.70	81% within ±0.5	91% within 1 line	-	-
Normal corneal vertex
Arbelaez et al. [ 4 ]	SCHWIND	CV	24	Myo Astig	6 M	-	-	-	38% improved	-	-
Arbelaez et al. [ 4 ]	SCHWIND	PC	29	Myo Astig	6 M	-	-	-	24% improved	-	-

CSCLR: coaxially sighted corneal light reflex; CLR: corneal light reflex; LOS: line of sight; CV: corneal vertex; PC: pupil center; n: number of eyes; Myo: myopia; Hyp: hyperopia; Astig: astigmatism; MRSE: manifest refraction spherical equivalent; BCVA: best corrected visual acuity; Res. Ref.: residual refraction; saf Index: safety index; eff Index: efficacy index.

ISSN: 2326-0254