Preoperative keratometry in hyperopic laser keratorefractive surgery: do steep corneas have worse outcomes?

Session Details

Session Title: LASIK & PRK I

Session Date/Time: Sunday 15/09/2019 | 16:30-18:00

Paper Time: 17:39

Venue: Free Paper Forum: Podium 3

First Author: : O.Spierer ISRAEL

Co Author(s): :    M. Mimouni   A. Nemet   G. Rabina   I. Kaiserman                    

Abstract Details

Purpose:

To report the visual and refractive outcomes of hyperopic patients undergoing laser keratorefractive surgery in preoperatively steep corneas versus a matched control group.

Setting:

Refractive Surgery Facility (Care Vision, Tel Aviv, Israel)

Methods:

The electronic medical records of 502 patients undergoing photo-refractive keratatectomy (PRK) or laser-assisted in situ keratomileusis (LASIK) between January 1, 2000, and November 1, 2016 were reviewed. Patients were divided into one of two groups: steep corneas (mean keratometry ≥44.00 D) and regular corneas (control group, mean keratometry <44.00 D). The two study groups were matched by age, gender, sphere and cylinder. Only the right eye of each patient was included. Outcomes included postoperative uncorrected distance visual acuity (UDVA), best-corrected distance visual acuity (CDVA), safety and efficacy indexes, refractive outcomes and retreatment rates.

Results:

Both groups were similar in demographics, visual acuity and refraction. Postoperatively, the steep group had a significantly higher mean keratometry as compare to the control group (46.52±1.43 D versus 44.58±1.68 D, p<0.001), Kmin (46.04±1.50 D versus 44.12±1.76 D, p<0.001) and Kmax (46.99±1.51 D versus 45.03±1.77 D, p<0.001). Both groups had similar postoperative UDVA and CDVA and achieved a similar final sphere (0.64±0.19 versus 0.54±1.19, p=0.44) and cylinder (-0.89±0.59 versus -0.86±0.72, p=0.67). Both groups had a high and similar efficacy index (0.92±0.22 versus 0.90±0.25, p=0.33).

Conclusions:

Hyperopic patients undergoing laser keratorefractive surgery with preoperatively steep corneas 44.0 D or higher can achieve adequate visual and refractive outcomes.

Financial Disclosure:

None