Corneal Topographer Tomography & Aberrometer

Led by Innovation

Placido disc, Scheimpflug camera & AS‑OCT Fusion

The combination of Placido disk topography, Scheimpflug tomography and AS-OCT offers ophthalmologists and optometrists with a vast array of measurements. It provides information on pachymetry, elevation, curvature and dioptric power of both corneal surfaces over a diameter of 12 mm to 16 mm. It calculates all biometric measurements of the anterior chamber using 25 sections from the cornea. Besides the clinical diagnosis of the anterior segment, the major benefits of these tomograph topographers include surgical planning, follow-ups in refractive surgery, cataract surgery and IOL applications. Optometry practices also require topographic data for contact lenses application, ortho-K fitting and dry eye assessments. For objective examination, these devices provide accurate measurements of the pupil diameter in scotopic, mesopic, photopic and dynamic conditions, and when combined with the corneal mapping through the Placido disc, these metrics are critical for refractive surgery planning, such as IOL selection, laser surgery suitability and follow-up reviews, widening the scope of surgical applications.

Aberrometer & Topographer Fusion

Osiris-T is a corneal topographer combined with a total ocular aberrometer, it is an indispensable system allowing the examination of complex ocular aberrations, both corneal and internal. Examples of applications include premium EDOF IOL centrations, Dynamic Accommodations Analysis and IOL Planning and more. The Osiris-T has a unique pyramidal sensor design that allows the aberrometer to measure aberrations with a resolution of 45,000 points (at the maximum pupil diameter), with a wide dynamic range. It can also measure the ocular wavefront in real time with a frame rate of up to 33 images per second: this makes it possible to measure and view changes in power and aberrations during accommodation.

The CSO Phoenix software offers a wide range of analysis options, such as refractive error maps and visual simulations (PSF, MTF and convolution with optotype), which helps the clinician to understand and explain the patient’s visual problems. Using a topography system based on a 22 ring Placido disk, Osiris-T measures the morphology and the corneal refractive component through sagittal curvature, tangential curvature, elevation and power maps. The availability of consolidated synthesis parameters makes the follow-up and diagnosis of keratoconus simple and intuitive. Integrating topography and aberrometry enables the wavefront calculation of the internal components (IOL Planning, Post Surgery analysis and examinations).

Keratoconus / Astigmatism

This feature is available for both the CSO MS39 (Topographer | AS-OCT Tomography) and the Sirius+ (Topographer|Scheimpflug Tomography).
Keratoconous screening offers clinician with important information about the patient's cornea.
Understanding this can help prevent complications associated with ectasia before corneal surgery.


The sharpness of the high-resolution section images on a diameter of 16 mm, together with the many details of the structure and the cornea layers brought to light by the instrument, are the most extraordinary features and appreciated by the specialists of the anterior segment (corneal and epithelial) . The device provides pachymetry, elevation, curvature and power information for both corneal surfaces down to an unequaled 3.5µ of precision.


Corneal and Epithelial

High-resolution section images on a diameter of 16 mm

Contact Lens Fitting

Sirius+ (Topographer | Scheimpflug Tomography) has a built-in pupillography measurement module. The measurement of the pupil in scotopic (0.04 lux), mesopic (4 lux), photopic (50 lux) conditions and in dynamic mode. Knowledge of the center and the diameter of the pupil, is essential for many clinical procedures which seek to optimize vision quality.

Antares Topographer features a contact lenses fitting module which simulates the fitting of rigid contact lenses based on an internal database of many lens manufacturers. Antares Topographer has white light to capture color images and motion pictures, it also has cobalt blue light for the analysis of contact lens fitting. It can change the magnification, allowing the capture of images with a wide visual field such as the tear meniscus and corneal redness.

Cataract Surgery

IOL CALCULATION MODULE available for the Sirius+ (Topographer / Scheimpflug Tomography) and MS39 (Topographer / AS-OCT Tomography) utilizes Ray-Tracing techniques, regardless of the state of the cornea (untreated or previously treated for refractive purposes), provides the calculation of the spherical and toric power of the intraocular lens.



All CSO Topographers come with Dry Eye Modules, based on the Ocular Surface Disease Index questionnaire (OSDI), limbal and conjunctival hyperaemia, Meibomian glands analysis, tear meniscus analysis, NIBUT, and tear osmolarity.
The combined score provides an overall evaluation of the clinical condition of the patient for a comprehensive objective diagnosis of the dry eye disease.


The evaluation of the performances of a toric system, the combination of corneal topography imported from CSO topographers and ocular aberration makes it possible to distinguish whether any astigmatic residue is due to a rotation of the lens or to an incorrect calculation.


The tool integrates with the Phoenix software, offering a wide range of analysis options, such as refractive error maps and visual simulations (PSF, MTF and convolution with optotype), which helps the clinician to understand and explain the patient’s visual problems.


Phoenix software enables the analysis of the patient’s ocular wavefront, both as a deviation from the wavefront and as a refractive difference from the ideal. Combining Placido disk information, The OSIRIS-T can derive Internal Wavefront (Internal IOL Wavefront) from the Corneal Wavefront and the Ocular Wavefront, providing invaluable, precise refraction information for IOL implantations.

CSO Antares



CSO Sirius+

Tomograph Topographer



Tomograph Topographer


CSO Osiris


(Real Time Pryamid Wavefront Aberrometer )

CSO Osiris-T


(Real Time Pryamid Wavefront Aberrometer + Topographer)




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