A Hewes tarsoconjunctival eyelid flap was raised and the effects on blood perfusion of rotating the flaps by 90° and 180°, stretching the flaps with a force of 5 or 10 N, and repeated diathermic coagulation was monitored with laser speckle contrast imaging.


 Diathermy decreased blood perfusion to 56% after being applied once.  Diathermy, however, has detrimental effects and should be avoided.
THERM