Posters

CLAK (crescentic laser-assisted keratectomy): new approach to treat keratectasia

Poster Details

First Author: C. Carriazo COLOMBIA

Co Author(s):    M. Cosentino                    

Abstract Details

Purpose:

To introduce a new technique and technology to treat keratoconus cases: the Crescentic Laser Assisted Keratectomy (CLAK)

Setting:

1. Centro Oftalmologico Carriazo, Barranquilla, Colombia 2. Instituto de la Vision, Buenos Aires, Argentina

Methods:

Anesthetic drops are instilled and 8 mm diameter-180 degrees open crescentic mask is placed. This mask is aligned with the patient's pupil. A platform developed for this purpose with excimer laser ablation (Schwind Amaris 1050, Germany) is used to perform the ablation through the mask. Once ablation is completed the edges of the resection are sutured with 8 interrupted stitches. Computer simulation finite element corneal model (Ansys, Inc.,USA) with arches of 90, 180, 270, 360 degrees have been done

Results:

Preoperative uncorrected visual acuity (UCVA) was 0.10 ± 0.22 and best spectacle corrected visual acuity (BCVA) was 0.53 ± 0.21; high order aberration (HOA) was 1.61 ± 2.09µ and coma was 10.28 ± 8.41µ; BCV index was 2.72 ± 2.49 µ. At 12 months, UCVA was 0.37± 0.19; BCVA was 0.72 ± 0.19; HOA and coma were 0.89 ± 0.47µ and 3.10 ± 1.98µ respectively. Decrease of anterior chamber depth was -0.31 ± 0.24 mm. Also, we analyzed other variables in order to analyze the safety, efficacy and predictability. Clinical results were ratified by Computer simulation.

Conclusions:

KC progression means increasing of anterior chamber depth due to the posterior corneal steepening, corneal thinning and deformation. CLAK is a safe technique. It produces corneal flattening, reduction of anterior chamber depth and decrease of optical aberrations. Also, it offers a possibility to do refractive complementary procedures due to CLAK’s wide optical zone. CS ratifies clinical outcomes and allows surgeons to perform a nomogram

Financial Disclosure:

One or more of the authors gains financially from product or procedure presented