Visual outcomes after Custom Q Presby-LASIK treatment

Session Details

Session Title: Hyperopic corrections

Session Date/Time: Sunday 14/09/2014 | 16:30-18:00

Paper Time: 17:42

Venue: Boulevard B

First Author: : A.Aramburu Del Boz SPAIN

Co Author(s): :    R. Ruiz              

Abstract Details

Purpose:

The main purpose of this study is to assess the clinical outcomes and the subjective experience of 35 presbyopic patients, being 20 hyperopes and 15 myopes, treated with the Custom Q Optimized treatment.

Setting:

Clínica Oftalvist CIO Jerez, Jerez de la Frontera, Spain

Methods:

A retrospective chart review was performed of 35 (20 hyperopes and 15 myopes) consecutive patients who underwent PresbyLasik procedure by a single surgeon (R.R.M.) between September 2012 and August 2013. The mean age of the patients was 45.54 years old in the myopic group and 46.83 in the hyperopic group of patients. Outcomes recorded 6 months postoperatively were uncorrected distance, near and intermediate visual acuities, contrast sensitivity (under photopic and mesopic conditions), defocus curves and the Q value.

Results:

The mean binocular visual acuity for both groups was –0.0363 logMAR, being -0.004 logMAR in the hyperopic group and -0.027 logMAR in the myopic group. The mean intermediate visual acuity was 0.245 logMAR. The results obtained when testing the near visual acuity were that 57.8% of patients were J1 or better, 78.9% were J2 or better, 94.7% were J3 or better and 5.2% were J5 or better. None of the patients showed a worse visual acuity than J5. All the patients showed contrast sensitivity within the standard normal range at low spatial frequencies and slightly reduced at high spatial frequencies both, under photopic and scotopic conditiond it was inferior in all the patients. Defocus curves results were similar to the results obtained with a monofocal intraocular lens. Q pre-operatory values were -0.33 in the myopic group and -0.24 in the hyperopic group. Post-operatory values were 0.08 and -0.89 respectively, showing an increase of 0.41 in the myopic and -0.65 in the hyperopic groups of patients. However these values were not reliable because we did not have instruments to measure the accurate 4 central millimeters of the corneal asphericity.

Conclusions:

Presbylasik customised treatments, creating a hyperprolate shape on the cornea, is an effective alternative for presbyopic patients. This treatment creates an aspheric hyperprolate corneal profile, that is, increase the positive spherical aberration and therefore the depth of focus. Furthermore, the ablation creates one foci of vision, which may be enhanced with monovision. As long as a multifocal cornea is not created this technique is not associated with halos and glare. We consider this treatment to be a viable option for presbyopia correction as long as it shows a good visual acuity at all evaluated distances giving high rates of spectacle freedom.

Financial Interest:

NONE