Effect of the femtosecond laser on an intracorneal inlay for surgical compensation of presbyopia during cataract surgery: scanning electron microscope imaging

Session Details

Session Title: Intracorneal Inlays for Presbyopia

Session Date/Time: Tuesday 08/09/2015 | 16:00-18:00

Paper Time: 17:36

Venue: Main Auditorium

First Author: : M.Ibarz Barberá SPAIN

Co Author(s): :    J. Rodriguez-Prats   J. Hernandez-Verdejo   P. Tana Rivero              

Abstract Details

Purpose:

To investigate the effect of the femtosecond laser on a Kamra intracorneal inlay during cataract surgery and to describe how the corneal inlay may change the effect of the laser on the lens.

Setting:

Oftalvist, Hospital Moncloa, Madrid, Spain.

Methods:

Femtosecond laser cataract surgery was performed on six porcine eyes were a Kamra had been implanted, exploring the lens under the surgical microscope. Another inlay was attached to the upper part of the transparent hemisphere used for calibration of the femtosecond laser. Capsulorhexis, arcuate incisions and phacofragmentation were carried out. The Kamra was compared with a non-treated inlay with a scanning electron microscope (SEM), and the hemisphere was analyzed with a surgical microscope.

Results:

Capsulorhexis and phacofragmentation were completed in all the porcine eyes, although accuracy to determine the exact effect on the lens was not possible to achieve. The effect of the femtosecond laser on the PMMA hemisphere through the inlay showed the capsulorhexis placed outside the outter margin of the inlay and a sharply sculpted fragmentation pattern with a 3-D (donut-shaped) annulus untreated beneath the Kamra. SEM images of the non-treated and the treated inlay were comparable. No ultrastructural changes were found in the treated Kamra.

Conclusions:

Femtosecond laser for cataract surgery can be performed with an intracorneal inlay for surgical compensation of presbyopia without the risk of damaging the inlay. The Kamra inlay acts as a screen that avoids the laser to reach the areas beneath it´s shadow, but not the exposed areas of the lens.

Financial Interest:

NONE