Abstract
Purpose :
To investigate the incidence and risk factors for the ptosis after trabeculectomy
Methods :
We retrospectively analyzed the medical records of 94 patients who received trabeculectomy by a single surgeon. Patients with previous eyelid surgery and ophthalmic surgery, and those with systemic disease affecting eyelid were excluded from the study. High eyelid crease or 2mm or more decrease of margin reflex distance-1 after surgery was defined as ptosis. Age, sex, location of the bleb, conjunctival incision site, Mitomycin C concentration, contact area, and soaking time were analyzed.
Results :
The incidence of ptosis was 19.1% (18/94) after 6 months of trabeculectomy. The incidence of ptosis was significantly higher in the 0.04% of the mitomycin C group than in the 0.02% of the mitomycin C group. (40.0% vs. 11.6%, p = 0.002). The incidence of ptosis was significantly higher in eyes with large contact area of mitomycin C to the posterior part of eye than in eyes with smaller contact area. (44.4% vs 9.0%, P<0.001). Age, gender, operative site, bleb site, and conjunctival incision site was not significant factor for postoperative ptosis. (p = 0.587, p = 0.614, p = 0.551, p = 0.931, p = 0.335). Logistic regression analysis showed that the large contact area of mitomycin C was statistically significant risk factor. (OR=8, P<0.005)
Conclusions :
The large contact area of mitomycin c to the posterior part of eye during trabeculectomy was found to be a risk factor for postoperative ptosis.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.