Corvis® ST

Corneal Visualization
Scheimpflug Technology

  • Evaluation of corneal biomechanical response
  • Biomechanically corrected IOP (bIOP)
  • Optimized ectasia detection
  • Biomechanical analysis after laser vision correction
  • Glaucoma screening
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Evaluation of corneal
biomechanical response,
tonometry and pachymetry

The revolutionary Corvis® ST records the reaction of the cornea to a defined air pulse using a newly developed high-speed Scheimpflug camera. This camera captures over 4 300 images per second, permitting highly precise measurement of IOP and corneal thickness. Based on a video of 140 images, taken within 31 ms after onset of the air pulse, the Corvis® ST provides a detailed assessment of corneal biomechanical properties.

The information obtained on the biomechanical response of the cornea is used to calculate a biomechanically corrected IOP (bIOP). Furthermore it allows ectatic diseases such as keratoconus to be detected at a very early stage. Biomechanical properties also play an important role in the development and progression of glaucoma.

Pentacam® and Corvis® ST
Work Together

Artificial intelligence approach for
enhanced ectasia detection

Gain accuracy in ectasia risk assessment by integrating tomographic data from the Pentacam® and biomechanical data from the Corvis® ST.

Combining tomography with biomechanical
properties provides the highest sensitivity

Linking the Pentacam® and Corvis® ST together is very easy. Just connect both
instruments to the same computer or connect them via your clinic network.
The rest is done automatically: Pentacam® and Corvis® ST measurements are combined and the TBI is calculated automatically. This works with any Pentacam® model*.
* A license for the Belin Ambrósio Enhanced Ectasia Software is required.

Big data and artificial intelligence

The TBI is based on an artificial intelligence algorithm using tomographic and
biomechanical data. The algorithm was trained on more than 2000 clinical
keratoconus and more than 500 forme fruste keratoconus patients. The superior
accuracy of the index has been proven in several peer-reviewed studies¹
¹Ferreira-Mendes J et al.: Enhanced Ectasia Detection Using Corneal Tomography and Biomechanics. American Journal of Ophthalmology 2019 Jan; 197:7-16


IOP/Pachy Display

bIOP readings are less dependent on biomechanical properties and corneal thickness and hence more accurate than IOP readings. The data are easy to read and interpret, and the IOP follow-up chart is neatly arranged.

Biomechanical Keratoconus Detection with the CBI

The Corvis Biomechanical Index (CBI) is based on a logistic regression approach and was developed to detect keratoconus at an early stage. It is based on five Dynamic Corneal Response parameters and gives a score from zero (low ectasia risk) to one (high ectasia risk).

Glaucoma Screening Software

This revolutionary software allows an easy screening for glaucoma based on the biomechanical response. It offers a new approach to detecting normal tension glaucoma (NTG) cases despite normal intraocular pressure.


Do you really know what biomechanical properties are? And what they have to do with the cornea?

Corvis® ST & Pentacam® combination in everyday practice: Tommy C. Y. Chan, MD

Refractive Camp OCULUS: Tomography meets Biomechanics
Prof. Cynthia Roberts, Prof. Renato Ambrosio,
Prof. Paolo Vinciguerra and Riccardo Vinciguerra, MD


Corvis® ST

WOC Special 2020

PDF (6 MB)


Mini Product Guide

WOC Special 2020

PDF (1 MB)


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