The use of air from the infusion line to confirm infusion tip positioning in vitreous surgery for eyes with media opacities.

Purpose: To demonstrate the use of an air bubble in infusion to ascertain infusion tip (IT) positioning before commencing vitreoretinal surgery (VRS) in eyes with media opacities.

Methods: Twenty-four eyes were studied. An air bubble was introduced into the IT by manually expelling fluid from the distal end of the IT.