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Topo-aberrometric link: 12 years experience and 726 cases

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Session Details

Session Title: Photoablation Outcomes I

Session Date/Time: Monday 07/09/2015 | 16:30-18:30

Paper Time: 16:54

Venue: Room 17

First Author: : M.Camellin ITALY

Co Author(s): :    S. Mosquera                    

Abstract Details


To retrospectively evaluate the clinical outcomes of aspheric corneal wavefront ablation profiles in Transepithelial PRK treatments (TPRK) over a large population and long follow-up times in very distorted corneas following previous surgery or scars.


Sekal Rovigo Microsurgery, Rovigo, Italy.


726 eyes treated by corneal wavefront TPRK were retrospectively analyzed at 1 to 12 years follow-up. Custom Ablation Manager (CAM) software was used to plan wavefront-customized aspheric treatments, and the ESIRIS or AMARIS systems were used to perform ablations (SCHWIND eye-tech-solutions). In all cases, standard examinations including preoperative and postoperative wavefront analysis with a CW topographer (Optikon Keratron Scout) were performed. Clinical outcomes were evaluated in terms of predictability, refractive outcome, safety, and wavefront aberration.


At the last follow-up, the mean UCVA was 4.7/10(SD 2.9) 20.3% of eyes achieved UCVA visual acuity from 7/10 to 10/10 in 20.3% of cases. Average defocus was reduced from -0.7+-3.7 (D) preoperatively (range: -17.25 to +8 D) to +0.5+-1.9 D postoperatively. Astigmatism was reduced from 2.5+-1.9 D (range: 0.00 to 8.00 D) to 1.4+-1.5 D. Best spectacle-corrected visual acuity improved from 6.3+-2.5 to 7.2+-2.3 (P=.003). The treatment strongly reduced RMS HOA from 1+-0.9 to 0,6+-0,8 (p=0.001), but as well coma from 0.7+-0.6 μm to 0.5+-0.5 μm (P=0.001) and spherical aberration from 0.3+-0.3 μm to 0.1+-0.3 μm (P=0.001).


These retrospective results indicate that the aspheric corneal wavefront customized CAM approach for planning ablation volumes is safe and effective. The CW customized approach shows its strength in cases where abnormal optical systems are expected. Apart from the risk of additional ablation of corneal tissue, systematic wavefront-customized corneal ablation can be considered as a safe and beneficial method.

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