Table 3.

Studies comparing Corvis ST parameters following LASIK and SMILE. Only the original Corvis ST values are included in the table. * Estimated marginal means at following values: Age at examination 36.7 years, CCT 472 mm, IOPcc 13.0mmHg. HC PD: Highest concavity peak distance. HC DA: Highest concavity deformation amplitude.

		Sefat et al. 2016 [48]		Pedersen et al. 2015 [26]		Osman et al. 2015 [38]		Shen et al. 2014 [47]
	Design	Prospective, comparable		Retrospective, comparable		Retrospective, comparable		Retrospective, comparable
		Preop	Postop	Preop	Postop	Preop	Postop	Preop	Postop
LASIK	No of eyes	48	48	n/a	35	25	25	17	17
	Follow up		3 months		37months		1 month		3 months
	A1 Time	7.34±0.41	6.84±0.21	n/a	6.82±0.02*	8.40±0.39	7.89±0.44	n/a	7.17±0.17
	A2 Time	21.65±0.44	22.04±0.31	n/a	21.7±0.06*	23.42±1.20	20.28±1.87	n/a	22.92±0.82
	A1 length	1.79±0.25	1.79±0.36	n/a	n/a	2.10±0.23	1.93±0.23	n/a	1.73±0.30
	A2 length	1.86±0.47	1.61±0.59	n/a	n/a	1.90±0.24	1.81±0.21	n/a	1.33±0.48
	A1 velocity	0.15±0.03	0.15±0.04	n/a	n/a	n/a	n/a	n/a	0.12±0.03
	A2 velocity	-0.38±0.11	-0.53±0.12	n/a	n/a	n/a	n/a	n/a	-0.53±0.12
	HC Time	16.71±0.48	16.79±0.47	n/a	16.1±0.08*	17.74±0.71	14.40±1.27	n/a	17.57±0.83
	HC Radius	8.18±1.31	7.07±0.77	n/a	6.06±0.09*	7.69±1.14	7.00±1.06	n/a	6.30±1.41
	HC PD	4.83±0.82	5.32±0.53	n/a	n/a	3.81±0.49	4.90±0.67	n/a	5.74±0.28
	HC DA	1.04±0.12	1.11±0.10	n/a	1.15±0.02*	1.02±0.10	1.26±0.07	n/a	1.19±0.13
SMILE	No of eyes	80	80	n/a	29	25	25	17	17
	Follow up		3 months		15 months		1 month		3 months
	A1 Time	7.25±0.33	6.74±0.25	n/a	6.75±0.03*	8.40±0.36	8.23±0.37	n/a	7.27±0.20
	A2 Time	21.73±0.37	22.01±0.86	n/a	21.8±0.07*	23.64±1.03	22.03±1.11	n/a	23.08±0.44
	A1 length	1.79±0.24	1.71±0.34	n/a	n/a	2.10±0.22	1.90±0.20	n/a	1.74±0.32
	A2 length	1.84±0.48	1.46±0.53	n/a	n/a	1.90±0.20	1.75±0.20	n/a	1.67±0.64
	A1 velocity	0.15±0.03	0.14±0.03	n/a	n/a	n/a	n/a	n/a	0.13±0.03
	A2 velocity	-0.39±0.08	-0.56±0.20	n/a	n/a	n/a	n/a	n/a	-0.49±0.15
	HC Time	16.91±0.42	16.81±0.35	n/a	16.4±0.01*	18.39±0.92	16.32±1.10	n/a	17.38±0.81
	HC Radius	7.89±0.82	6.60±0.68	n/a	6.25±0.11*	7.99±1.35	6.91±1.25	n/a	5.74±0.91
	HC PD	4.46±1.10	5.37±0.59	n/a	n/a	4.09±0.69	4.72±0.71	n/a	5.57±0.41
	HC DA	1.05±0.09	1.13±0.10	n/a	1.20±0.01*	1.05±0.08	1.10±0.08	n/a	1.17±0.11
	Conclusion	In a subgroup matched for spherical equivalent (26 LASIK, 43 SMILE), no significant differences were found in the postoperative Corvis ST parameters		HC time was significantly shorter after LASIK compared with SMILE, while no differences were seen in remaining parameters		The percentage of reduction in A1 Time, HC Time and A2 time was larger after LASIK than SMILE. The percentage of increase in HC peak distance and deformation amplitude was significantly larger after LASIK than SMILE.		No significant differences in mean values of deformation amplitudes and time between LASIK and SMILE.