High Definition Video Exploration of Epi-LASIK Surgery and Bowman’s Membrane Using the Moria System

James S. Lewis, MD | Elkins Park, PA 19027 USA

Purpose:

To investigate the Moria Epi-LASIK microkeratome and the nature of the surface it leaves behind.

Method:

High Definition surgical video was gathered during a number of Epi-LASIK procedures. The Ikegami 20-DI 2-chip HD camera mounted on a standard Zeiss Operating Microscope collected uncompressed video directly to a 6 terrabyte RAID. Video was captured in 12-bit color using a PCIe card from BlackMagicDesign. Final Cut Pro Studio 2 was used to edit the video. Enhanced video imaging (EVI) was achieved through the construction of a custom filter (video transform) written by the author.

Results:

The Moria system elegantly cleaves a continuous flap of epithelium from Bowman’s membrane. The surface left behind by the Moria Epi-LASIK microkeratome is pristine. EVI effectively grades the corneal stromal texture in Epi-LASIK, SBK, and LASIK.

Conclusion:

The surface quality of Bowman’s membrane is much smoother than the stromal surface produced by mechanical or femtosecond laser microkeratomes.

This may explain why the image quality following Epi-LASIK is superior.

Moria Epi-LASIK Microkeratome (row 1)

Moria Epi-LASIK Microkeratome (row 2)

Bowman’s membrane after Epi-LASIK pass (row 3)

Bowman’s membrane after Epi-LASIK pass (row 4)

Bowman’s membrane after Epi-LASIK pass (row 5)

Bowman’s membrane after Epi-LASIK pass (row 6)

Bowman’s membrane after Epi-LASIK pass (row 7)

Abstract number:005834
Title: Very thin flap LASIK using the Moria One Use Plus 90 Microkeratome
Presenting / First Author: Lewis
Poster Code: RS-D2-278
Panel No.: 278
Presentation Day: Jun 29, 2008
Attendance Schedule: 1600-1730

Abstract number:005837
Title: High Definition Video Exploration of Epi-LASIK Surgery and Bowman’s Membrane using the Moria System
Presenting / First Author: Lewis
Poster Code: RS-D2-279
Panel No.: 279
Presentation Day: Jun 29, 2008
Attendance Schedule: 1600-1730