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Br J Ophthalmol 86:479 doi:10.1136/bjo.86.4.479
  • Letter

Blinking and operating: cognition versus vision

Table 1

Average blink rates (No/min) for ophthalmic surgeons during periods of casual conversation and while operating using the microscope

Surgeon 1 2 3 4 5 6 7 8 9 Mean (SD)
Casual 17.29 17.75 7.75 17.60 27.44 24.67 11.50 13.86 12.33 16.69
Operating 9.71 9.00 0.29 7.40 1.68 8.67 1.59 3.86 0.54 4.75
p Value 0.000002 0.002 0.002 0.002 0.0001 0.0001 0.00003 0.0004 0.0002 0.0003

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