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Comparison of corneal haze and visual outcome in primary DSAEK versus DSAEK following failed DMEK

  • Francisco Arnalich-MontielEmail author
  • José L. Hernández-Verdejo
  • Noelia Oblanca
  • Francisco J. Muñoz-Negrete
  • Maria P. De Miguel
Cornea

Abstract

Background

Descemet membrane endothelial keratoplasty (DMEK) is being proposed as the procedure of choice in corneal endothelial disease as it achieves better visual and refractive outcomes than Descemet stripping automated endothelial keratoplasty (DSAEK). Nevertheless, primary graft failure is frequent, especially during the learning curve, and secondary back-up procedure consists on DSAEK. We aim to compare corneal haze and visual acuity of patients undergoing primary DSAEK vs. patients undergoing DSAEK as a back-up procedure after primary DMEK failure.

Methods

This study is a comparative case series that included 19 eyes from 16 patients with early stages of corneal failure and limitation of daily activities after primary DSAEK or secondary DSAEK. A control group of non-operated corneas included 10 aged-matched normal eyes. The study was conducted at University Hospital Ramón y Cajal and Vissum Hospital, Madrid, Spain. Corneal densitometry readings and postoperative best-corrected visual acuity in subjects with primary and secondary DSAEK were recorded 6 months after the surgery using the Pentacam Scheimpflug system (Oculus, inc.,Wetzlar, Germany).

Results

In primary DSAEK median densitometry values (range) were statistically significantly higher (p < 0.05) than normal subjects for the full thickness, posterior and anterior part of the paracentral cornea; and the anterior part of the central cornea. In secondary DSAEK, median densitometry values were statistically significantly higher than normal subjects at all levels of the central and paracentral cornea. In secondary DSAEK, median densitometry values (range) were statistically significantly higher than in primary DSAEK in the full-thickness, anterior part and interface of the central cornea and in the full-thickness and posterior part of the paracentral cornea. Median visual acuity between groups (p = 0.47) was statistically better for the primary DSAEK group, which also had a higher percentage of patients achieving BCVA of ≥ 20/40 and ≥20/25 than the secondary DSAEK group (100 % vs. 62 % and 60 % vs. 0 % respectively).

Conclusions

There is an increase in central corneal light scattering after secondary DSAEK performed after a failed DMEK as compared to primary DSAEK. This has a negative impact on final visual acuity that needs to be considered in each patient when starting DMEK surgery.

Keywords

DMEK Back-up procedure Corneal haze Corneal densitometry 

Notes

Financial support

This work was also supported by grants to F.A.-M. from DGTATX, Ministerio de Sanidad y Consumo (Proyecto TRA-036), and Fundación Mutua Madrileña, Spain. The sponsor or funding organization had no role in the design or conduct of this research.

Financial disclosure(s)

The author(s) have no proprietary or commercial interest in any materials discussed in this article.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Francisco Arnalich-Montiel
    • 1
    • 2
    • 4
    Email author
  • José L. Hernández-Verdejo
    • 2
  • Noelia Oblanca
    • 1
  • Francisco J. Muñoz-Negrete
    • 1
  • Maria P. De Miguel
    • 3
  1. 1.Cornea Unit. Ophthalmology DepartmentRamón y Cajal HospitalMadridSpain
  2. 2.Vissum Madrid Eye HospitalMadridSpain
  3. 3.La Paz Hospital Research InstituteMadridSpain
  4. 4.Servicio de OftalmologíaHospital Ramón y Cajal de MadridMadridSpain

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