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Real-time intraocular pressure measurement during femtosecond laser-assisted cataract surgery (FLACS)

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Session Details

Session Title: Femto Cataract II

Session Date/Time: Monday 15/09/2014 | 14:30-16:30

Paper Time: 15:26

Venue: Boulevard B

First Author: : M.Ibarz SPAIN

Co Author(s): :    P. Tañá   J. Hernández-Verdejo   G. Bolívar   J. Rodríguez-Prats   M. Teus  

Abstract Details


To investigate the changes in intraocular pressure (IOP) in porcine eyes during femtosecond laser assisted cataract surgery (FLACS) using a liquid-optic interface system.


Oftalvist Hospital Moncloa, Madrid, Spain


Femtosecond laser cataract surgery with a liquid optics interface platform for cataract surgery was performed on freshly enucleated porcine eyes. Capsulorhexis and lens fragmentation were completed in all the eyes without complications. IOP was measured with a reusable blood pressure transducer connected by direct cannulation to the anterior chamber, recording data before suction (basal IOP), at the beginning of the suction phase, every five seconds during femtosecond procedure, and after the removal of the suction ring from the eye.


Nine porcine eyes were used in this study. Basal IOP before suction was 5.67 ± 2.39 mmHg, rising to 20.33 ± 4.18 mmHg at the beginning of the suction phase (p < 0.001). During femtosecond procedure, IOP reached a mean value of 19.74 ± 4.31 mmHg, remaining stable during the entire process. The IOP recorded immediately prior to removal of the suction ring was 21.00 ± 6.93 mmHg, returning to basal values in all the eyes after the suction ring was removed, with no statistical differences between basal and post-suction IOP. Total femtosecond procedure time was 125.9 ± 15.9 seconds.


Real-time IOP can be measured during FLACS using a transducer connected to the anterior chamber. The results showed a significant increase in IOP during the procedure due to the pressure exerted by the suction ring but not by the effect of the femtosecond laser.

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