Table 1.

Gray level of different vitreoretinal surgery instruments.

Instrument	Mean gray level	Standard deviation	Offset from control	p-value (significance < 0.05)
Vitrectome	12.57	2.05	− 68.51%	< 0.001
ILM forceps	25.47	7.34	− 36.21%	< 0.001
Silicone tipped cannula	22.89	6.01	− 43.96%	< 0.001
Finesse® flex loop	51.43	2.86	13.75%	< 0.001
Finesse® flex loop (shadow adjusted)	30.4	7.2	− 32.75%	< 0.001
Tano diamond dusted membrane scraper	44.04	4.72	5.51%	< 0.001
Tano diamond dusted membrane scraper (shadow adjusted)	18.43	9.48	− 55.84%	< 0.001