Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Aqueous humor PH changes using femtosecond laser-assisted cataract surgery and intracameral mydriatic solution: our experience

Poster Details

First Author: M. Rossi ITALY

Co Author(s):    M. Bordin   F. Di Censo   C. Gandolfi   R. Tassone   M. Al Oum        

Abstract Details


To compare aqueous humor pH values in patients during femtosecond laser-assisted cataract surgery with patients during conventional phacoemulsification and to evaluate the effect of a new intracameral mydriatic solution


Vista Monza, Eye Clinic, Monza, Italy


30 eyes of 30 patients underwent cataract surgery by asingle surgeon. Group 1 included 15 eyes operated on with a femtosecond platform (Catalys; Abbott Medical Optics, Santa Ana, CA) and Group 2 included 15 eyes that were operated on with conventional phacoemulsification. Tropicamide / phenylephrine hydrochloride / lidocaine hydrochloride 0.2 mg/ml + 3.1 mg/ml + 10 mg/ml solution (mydrane) were used as intracameral mydriatic. Aqueous humor samples (0.10 to 0.15 mL) were collected through a paracentesis from each patient after docking and nucleus fragmentation in Group 1 and after corneal incisions in Group 2, then analyzed with a pH meter.


We did not have any surgical complication. The mean pH was 6.53 ± 0.09 (range: 6.42 to 6.70) and 7.42 ± 0.07 (range: 7.28 to 7.48) in Group 1 and 2, respectively (P < .001). Intraoperative mydriasis were stable and did not change during surgery in both two groups.


Photodisruption process in femtosecond laser-assisted cataract surgery lead to an acidic shift of the aqueous humor pH as a result of the transformation of carbon dioxide to carbonic acid. PH shift do not significantly interact with and affect the function of Mydrane. Further analysis of femtosecond laser-assisted cataract surgery and Mydrane are necessary.

Financial Disclosure:


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