Posters

Comparison of the effect of progressive and standard intrastromal ring segments implantation on corneal aberrations

Poster Details

First Author: E.Jerhotova CZECH REPUBLIC

Co Author(s):                        

Abstract Details

Purpose:

To compare the results of implantation of 2 distinct types of kerarings in patients with keratoconus II. or III. degree with a focus on the evaluation of postoperative low- and high-order aberrations.

Setting:

Retrospective study at the Eye Clinic Duovize between 2015 and 2020

Methods:

The authors evaluate the effect of standard (SI) and progressive (AS) kerarings on low- and high-order aberrations. Subjective (UCVA, BCVA) and objective refraction (AR) and keratometry and aberrations as measured on Pentacam were evaluated before and 1 and 3 month after the surgery. The study included 26 patients, aged 21 to 46 years, who had an intrastromal corneal ring for keratoconus implanted at our clinic between 2015 and 2020. For calculation of the type of keraring we used the nomogram recommended by the manufacturer. Implantation was performed by one surgeon; the intrastromal channel was formed by a femtosecond laser.

Results:

21 eyes were implanted with standard keraring (SI), 12 eyes were implanted with progressive keraring (AS). In our group of patients, patients with progressive intracorneal ring segments showed a significant improvement in central visual acuity compared to patients with implanted standard kerarings while comparable objective refraction in both groups of patients was detected.

Conclusions:

Postoperative central visual acuity improvement could be associated with reducing of high-order aberrations after implantation of progressive kerarings. Unfortunately, the results are not statistically significant for a small group of patients and need to be extended in the future.

Financial Disclosure:

None