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Studies

Here you can find studies on

  • the anterior eye segment
  • the Pentacam®  

Most of these studies are in English.

Publications: Studies

Repeatability and agreement of wavefront aberrations of a new hybrid topographer and aberrometer in healthy eyes

This study assessed the repeatability and agreement of the Pentacam AXL Wave vs the i-Trace.

“… Pentacam AXL Wave had repeatability with an ICC for total ocular aberrations ranging from 0.84 for HOAs to 0.92 for LOAs and for corneal from 0.76 for HOAs to 0.86 for LOAs. The Sw, TRT, and CoV of all aberrations were significantly lower (better) than those of iTrace (P < .001). …

Conclusions: The repeatability estimates for wavefront aberrations using Pentacam AXL Wave were significantly better than those using i-Trace. Both devices showed excellent correlations for total ocular aberrations.“

 

Link to the study

Impact of tear optics on the repeatability of Pentacam AXL wave and i-Trace in measuring anterior segment parameters and aberrations

The study assessed the impact of tear optics on the repeatability of the Pentacam AXL Wave compared to the i-Trace.

“… All measurements with Pentacam AXL Wave with OSI < 1 had excellent repeatability, intraclass correlation coefficient (ICC) ranging from 0.88 for HOA, to 0.92 for LOA. The Sw, TRT, and COV of all aberration measurements were significantly lower (better) than those of iTrace … .

Conclusion: Tear optics affected repeatability of Pentacam Wave and i-Trace. Pentacam Wave had better repeatability in eyes with a poor tear film as compared to i-Trace.”

 

Link to the study

Repeatability and Agreement of a New Scheimpflug Device and a Hartmann-Shack Aberrometer With a Ray-Tracing Aberrometer in Normal, Keratoconus, and CXL Groups

Besides the assessment of the device performance for normal and healthy eyes, even more interesting are their performance in abnormal - the challenging eyes. Due to the fact, that the Pentacam AXL Wave outperformed the i-Trace in the normal, healthy eye group anyway, only the repeatability of the Pentacam AXL Wave and the comparison between the two devices was analysed in the study.

METHODS: In this cross-sectional, observational study, normal, keratoconus, and CXL groups with 125 eyes in each of the three groups were included. All eyes underwent three sets of measurements, at a single visit, using the Pentacam AXL Wave (Oculus Optikgeräte GmbH) and i-Trace (Tracey Technologies). Keratometry, pachymetry, objective refraction, and total ocular aberrations including …

CONCLUSIONS: The Pentacam AXL Wave showed comparable repeatability in the normal and keratoconus groups, but was poorer in the CXL group … .

 

Link to the study

Both Subjective Emotional Distress and Visual Handicap Correlate with Belin ABCD Classification in the Worse Eye as Measured with the “Keratoconus End-Points Assessment Questionnaire” (KEPAQ)

Kepa Balparda, Tatiana Herrera-Chalarca3, Laura Andrea Silva-Quintero, Sneider Alexander Torres-Soto, Laura Segura-Muñoz, Claudia Marcela Vanegas-Ramirez

Clin Ophthalmol. 2020 Jun 30;14:1839-1845. doi: 10.2147/OPTH.S261785. eCollection 2020.

 

Link to the study

Keratoconus staging by decades: a baseline ABCD classification of 1000 patients in the Homburg Keratoconus Center

Elias Flockerzi , Kassandra Xanthopoulou, Susanne Christiane Goebels, Elena Zemova, Sonia Razafimino, Loïc Hamon , Theresia Jullien, Ulrike Klühspies, Timo Eppig, Achim Langenbucher, Berthold Seitz

Br J Ophthalmol. 2021 Aug;105(8):1069-1075. doi: 10.1136/bjophthalmol-2020-316789. Epub 2020 Aug 23.

 

Link to the study

Evaluating keratoconus progression prior to crosslinking: maximum keratometry vs the ABCD grading system

Vinciguerra, Riccardo MD; Belin, Michael W. MD; Borgia, Alfredo MD; Piscopo, Raffaele MD; Montericcio, Alessio MD; Confalonieri, Filippo MD; Legrottaglie, Emanuela F. MD; Rosetta, Pietro MD; Vinciguerra, Paolo MD

J Cataract Refract Surg. 2021 Jan 1;47(1):33-39. doi: 10.1097/j.jcrs.0000000000000475.

 

Link to the study

The ABCD Keratoconus Grading System-A Useful Tool to Estimate Keratoconus Progression in the Pediatric Population

Dubinsky-Pertzov B, Reinhardt O, Gazit I, Or L, Hecht I, Pras E, Einan-Lifshitz A.

Cornea. 2021 Oct 1;40(10):1322-1329. doi: 10.1097/ICO.0000000000002632.

 

Link to the study

Repeatability and agreement of Scheimpflug-based and swept-source optical biometry measurements.

Sel S, Stange J, Kaiser D, Kiraly L.

Cont Lens Anterior Eye. 2017 Mar 22. pii: S1367-0484(16)30229-6. doi: 10.1016/j.clae.2017.03.007. [Epub ahead of print]

 

Link to the study

Comparison of Axial Length, Corneal Curvature, and Anterior Chamber Depth Measurements of 2 Recently Introduced Devices to a Known Biometer.

Shajari M, Cremonese C, Petermann K, Singh P, Müller M, Kohnen T.

Am J Ophthalmol. 2017 Jun;178:58-64. doi: 10.1016/j.ajo.2017.02.027. Epub 2017 Mar 2.

 

Link to the study

Dual versus single Scheimpflug camera for anterior segment analysis: Precision and agreement

Jaime Aramberri et al.

 

Journal of Cataract & Refractive Surgery, Volume 38, Issue 11, November 2012, Pages 1934-1949

 

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