Analysis and effects of laser anterior ciliary excision on dysfunctional lens syndrome using Ray Tracing Wavefront analysis after laser anterior ciliary excision on presbyopic eyes

Session Details

Session Title: Corneal and Scleral Treatment

Session Date/Time: Wednesday 09/09/2015 | 08:00-09:30

Paper Time: 09:12

Venue: Room 13

First Author: : K.Rocha USA

Co Author(s): :    A. Hipsley   G. Waring IV   D. Ma              

Abstract Details

Purpose:

To evaluate serial measurements of higher-order aberrations and depth of focus using ray-tracing aberrometry findings are analyzed along with effects of Laser Anterior Ciliary Excision (LaserACE) procedure on dysfunctional Lens Syndrome (DLS).

Setting:

A single arm clinical trial

Methods:

A 2.94um Er:YAG is used to perform micro-ablations in the sclera in three critical anatomical zones to reduce ocular rigidity and restore natural accommodative function. A ray-tracing aberrometer was used to objectively measure 20 eyes of 10 patients preoperatively at 1 week, 1 month and 3 months after LaserACE treatment. The modular transfer function (MTF) of the internal optics as well as the dysfunctional lens index (DLI) were evaluated. Near(40cm) and intermediate(60cm) visual acuity, accommodation in diopters for each eye and changes in defocus, spherical aberration, coma ,trefoil, level of opacity, and DLI were recorded.

Results:

The visual acuity improved in all subjects between 2-4 lines. There was no statistical change in UDVA or CDVA (p<0.01). The accommodative range increased 1.25-1.5D (p<0.034) after LaserACE treatment. Changes in SA, Coma, Trefoil, defocus, and accommodation were noted. LaserACE showed a positive effect on DLI and MTF of the internal optics.

Conclusions:

Ray-tracing technology can objectively measure dynamic accommodation as well as specific lens behavior. Changes after LaserACE procedure were seen in both spherical aberration and depth of focus. Pseudoaccommodation from changes in spherical aberration and increased depth of focus may contribute to near vision functionality. LaserACE may prove a valuable therapy for patients who have dysfunctional lens syndrome. Further, Ray tracing wavefront analysis changes after the LaserACE procedure may explain some of the effects of the procedure.

Financial Interest:

One of the authors receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, One of the authors travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, One of the authors research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented