Table 2.

Quality appraisal of included studies.

	de Benito-Llopis et al. [1]	Kaya et al. [2]	Kirwan and O'Keefe [3]	Chung et al. [4]	Tobaigy et al. [5]	Richter-Mueksch et al. [6]	Tietjen et al. [7]	Teus et al. [8]	Kim et al. [9]	Buzzonetti et al. [10]	Kim et al. [11]	Kim et al. [12]
Prospective (?)	Yes	Yes	Yes	Yes	No	Yes	Yes	No	No	Yes	No	Yes
Randomization (?)	No	Yes	No	No	No	No	No	No	No	No	No	No
Concealed allocation (?)	No	No	No	No	No	No	No	No	No	No	No	No
Blinded outcome assessors (?)	Yes	No	No	No	No	No	No	Yes	No	No	No	No
Completeness of follow-up (?)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
One patient treated with two surgeries (?)	No	Yes	No	No	No	No	Yes	No	No	No	No	No
Similar MRSE (?)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes
Similar BCVA (?)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unclear	Yes	Unclear	Unclear	Unclear
Similar pachymetry (?)	Unclear	Yes	No	Unclear	No	Unclear	Yes	Yes	Unclear	Unclear	No	Unclear
One surgeon (?)	Yes	Unclear	Yes	Unclear	Yes	Unclear	Yes	Yes	Yes	Unclear	Yes	Yes
One machine (?)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Timing of the outcome assessment similar (?)	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes