[The clinical analysis of corneal interface fluid syndrome].

Objective: To analysis the clinical characteristics of corneal interface fluid syndrome (IFS).
Methods: This is a retrospective study. During Jun. 2007 to Oct. 2011. Eight cases (12 eyes) of IFS were diagnosed at Henan Eye Institute. The history and complete ophthalmic examination that include Slit-lamp examination, Slit-lamp photography, IOP, anterior segment OCT (AS-OCT), confocal microscopic exams were recorded.
Results: In total 8 cases (12 eyes), 4 cases were bilateral, 4 cases were unilateral. Six patients were male and 2 were female. The age of the patients ranged from 19 to 35 years. Post-lasik steroid-induced elevated IOP was 4 eyes in 2 patients. Primary open angle glaucoma was 4 eyes in 2 patients. 1 patient (1 eye) was Posner-Shlossman syndrome, 1 patient (1 eye) was pigmented glaucoma, 1 patient (1 eye) was post-lasik traumatic iritis. 1 patient (1 eye) got IFS after repeated flap reposition because of epithelium ingrowth. Slit-lamp exam indicated edematous corneal, lamellar haze, interface fluids accumulation. AS-OCT showed obvious interface dark area. Confocal microscopy exam showed edematous corneal flap, more oval and large keratocytes' nuclei but no inflammatory cells.
Conclusions: IFS is a rare but serious complication after LASIK. The main causes are high intraocular pressure and/or dysfunction of corneal endothelium. Careful exam by slit-lamp may help diagnosis, and further AS-OCT and/or in vivo confocal microscopy exam will confirm it.