Since then I have spoken with a few people who either believed, or suspected, or from their description I myself suspected, were suffering from the same effect but without the Jones tubes. I posted about it once before in my newsletter hoping to drum up more information but no such luck. When I saw this case report I emailed the author asking if this was a credible explanation (i.e. that CPAP pressure could force air the wrong way through the canaliculus) and he felt it might given sufficient pressure to bypass the valves in the lacrimal system. Anyway, just putting this out there for what it's worth. There are so many people using CPAP these days, surely we'll here more in the next few years.
A 49-year-old woman, who had previously undergone bilateral Jones tube placement, began nasal continuous positive airway pressure for obstructive sleep apnea. The patient's use of continuous positive airway pressure was limited by intolerance of the transfer of air through the Jones tube to her ocular surface resulting in irritation and discomfort. A change from nasal continuous positive airway pressure to a full face mask, including both Jones tubes in the pressure circuit, resolved the problem.
Ophthal Plast Reconstr Surg. 2012 May 21. [Epub ahead of print]
Servat JJ, Black EH, Gladstone GJ.
*William Beaumont Hospital, Department of Ophthalmology, Royal Oak, Michigan, U.S.A. †Kresge Eye Institute/Wayne State University, St. Antoine Detroit, Michigan, U.S.A.