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Separate measurements, combined assessments

The Winning Duo for Corneal Biomechanics

OCULUS Corvis® ST OCULUS Pentacam® AXL

Tisch mit OCULUS Corvis® ST und OCULUS Pentacam® AXL

Corneal biomechanics: What are the advantages for me?

The combination of biomechanical data from the Corvis® ST and tomographical data from Pentacam® examinations enable you to safely provide care for more patients:

  • You improve identification of patients at risk of developing ectasia after refractive surgery.
  • You have a very precise procedure for early detection of keratoconus available to you.
  • You gain new possibilities in glaucoma screening through corneal biomechanics. This is due to precise intraocular pressure measurements based on biomechanically corrected intraocular pressure (bIOP) readings.


Higher certainty in refractive screening

The combination of corneal biomechanics and tomography increases the precision of refractive screening thanks to the Tomographic Biomechanical Index (TBI). The TBI shows you the overall assessment of ectasia risk at a glance. This increases both safety and efficiency, as it enables you to much more easily detect and reduce the danger of ectasia, among other things.

Corvis® ST

Comprehensive biomechanics analysis

Dynamic Scheimpflug technology was the first to measure in detail the biomechanical response of the cornea to a pulse of air. Corneal biomechanics play a crucial role in intraocular pressure measurements, in the development of ectasia, and in refractive surgical interventions.


  • Biomechanical ectasia detection
  • Follow-up after cross-linking
  • High-precision IOP measurements
  • Glaucoma screening based on biomechanics

More information

Pentacam® AXL

Detailed anterior segment tomography

The Pentacam® AXL delivers all-important information on everything from the epithelium to the posterior surface of the crystalline lens in 2 seconds. With its many easy-to-interpret diagnostic tools, it is invaluable for pre-operative diagnostics. A comparison with normative data allows for simple and rapid screening (Fast Screening Report).


  • Tomographic ectasia detection
  • Selection of premium IOL in 4 steps
  • IOL calculations for spherical, aspherical and toric IOLs
  • Optimization of IOL constants

More Information

OCULUS Pentacam® AXL

What are the Experts Saying About Corneal Biomechanics?

OCULUS places the upmost emphasis on precision and practicability in all of our product development. Therefore, there is almost nothing more important than reports from daily practice. Watch here what renowned experts have to say about the integration of the winning duo Corvis® ST and Pentacam® in the field of corneal biomechanics.

Renato Ambrósio Jr, MD, PhD
Hear how Prof. Ambrósio talks about the advantages of integrating tomography and biomechanics.

Renato Ambrósio Jr, MD, PhD
Hear how Prof. Ambrósio uses the Corvis® ST in his daily practice.

Paolo Vinciguerra, MD
Biomechanical Characterization of Subclinical Keratoconus (difficult case examples)

Riccardo Vinciguerra, MD
Detection of Keratoconus with a new Biomechanical Index

Renato Ambrósio Jr, MD, PhD
Integration of Scheimpflug-Based Corneal Tomography and Biomechanical Assessments

Renato Ambrósio Jr, MD, PhD
Ultimate ectasia detection and integration of Pentacam® & Corvis® ST

Riccardo Vinciguerra, MD
The normality values of corneal biomechanics: the Vinciguerra Screening Report

Paolo Vinciguerra, MD
A novel Corvis Biomechanical Index for the screening of corneal ectasia

Cynthia Roberts, PhD
Two novel stiffness parameters for the Corvis® ST

What Studies are Available on Corneal Biomechanics?

We place great emphasis on scientific testing of the measurement and assessment functions of OCULUS instruments. Numerous studies on the topic of corneal biomechanics have been carried out in recent years with the Corvis® ST. In these studies, independent experts have validated the high precision and accuracy of the Corvis ® ST over and over, as well as its usefulness for various clinical applications. Here is an overview of the most important studies:

Biomechanical Assessment with the Corvis® ST and Integration with Tomography

"Biomechanical Assessment with the Corvis® ST
and Integration with Tomography"

Prof. Cynthia Roberts, PhD, Ohio, USA,
Prof. Paolo Vinciguerra, MD; Riccardo Vinciguerra, MD, Milan, Italy,
Prof. Renato Ambrósio Jr, MD, PhD; Bernardo T. Lopes, MD, Rio de Janeiro, Brazil,
Prof. Ahmed Elsheikh, PhD, Ashkan Mohammadvali; Kai-Jung Chen; Liverpool, UK

The Special Supplement is published by Jaypee Highlights Medical Publishers, Inc.
and inserted in the September issue (No 4) of Highlights of Ophthalmology Journal.


Vinciguerra R, Ambrósio R Jr, Roberts CJ, Azzolini C, Vinciguerra P.:

"Detection of Keratoconus With a New Biomechanical Index"

Journal of Refractive Surgery, Vol. 32, No. 12 2016

Download ›

Vinciguerra R, Ambrósio R Jr, Roberts CJ, Azzolini C, Vinciguerra P.:

"Biomechanical Characterization of Subclinical Keratoconus Without Topographic or Tomographic Abnormalities."

J Refract Surg. 2017 Jun 1;33(6): 399-407

Download ›

Roberts et al.:

"Introduction of Two Novel Stiffness Parameters and Interpretation of Air Puff Induced Biomechanical Deformation Response Parameters with a Dynamic Scheimpflug Analyzer."

Journal of Refractive Surgery 2017 April 1 33(4):266-273

Link ›

Vinciguerra R et al.:

"Influence of Pachymetry and Intraocular Pressure on Dynamic Corneal Response Parameters in Healthy Patients."

Journal of Refractive Surgery 32 (8) (2016), 8:550-561

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Lopes BT, Roberts C, Elsheikh A, Vinciguerra R, Vinciguerra P, Reisdorf S, Berger S, Ambrosio R:

"Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response: Response Parameters Measured by the Corvis ST"

Link ›

Joda AA et al.:

"Development and validation of a correction equation for Corvis tonometry."

Comput methods biomech biomed engin journal 19 (9) (2016): 943-953

Link ›

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