Keratograph 5M

Corneal Topography



More than just a topographer!

Keratograph 5M technology is a revolution in corneal topography and dry eye analysis. The high-resolution colour camera and the integrated magnification changer offer a new perspective on the tear film assessment procedure.

Measurements with Placido disc illumination

The white annular illumination is used to precisely measure thousands of points on the surface of the cornea. Infrared annular illumination is available during tear film analysis to prevent light reflection and glare.

Measurements with light emitting diodes

The Keratograph 5M provides the ideal illumination for every application: white diodes for the assessment of tear film particles movement, blue diodes for fluorescein imaging, infrared diodes for meibography.

In addition to these unique features the Keratograph 5M measures corneal topography precisely. The built-in real keratometer and automatic measurement activation guarantee perfect reproducibility of K values. Data is acquired by non-contact measurement, automatically analysed and shown in comprehensive presentation formats.

Build trust

The Keratograph 5M enables you to show images your patients have never seen before. Build trust by providing professional consultation during examinations and follow-ups.



Meibography of the upper and lower eyelidThe new Keratograph 5M is a multi-purpose diagnostic device that easily and efficiently integrates complex examinations such as meibography into ophthalmological and optometric practices. Dry eye is most commonly caused by meibomian gland dysfunction (MGD). Meibo-Scan reveals morphological changes in the glandular tissue.

The new Keratograph 5M is patient-friendly and takes measurements at a greater distance from the eye. An image section of 26mm permits optimal examination of the lower and upper eyelids.

3D display of the meibomian glands



Visualising tear film quality and quantity

The OCULUS Keratograph 5M evaluates the tear film with the aid of white or infrared illumination. The new high-definition colour camera makes finest structures visible. NIKBUT (non-invasive Keratograph break-up time), tear meniscus height, lipid layer and tear film particles movement are examined carefully and documented with ease. The exams are non invasive, user-friendly and reproducible.


Evaluation of tear film break-up timeTear film break-up time measurement with the

Keratograph 5M is touch-free and fully automatic. The new infrared illumination is invisible to the human eye and produces no glare during the examination and no reflex tearing.TF-Scan maps tear film break-up time, making it a great tool for follow-up and patient consultation.


Evaluation of tear film quantity

With an integrated measuring guide and various magnification tools you can measure tear meniscus height and evaluate its characteristics along the lower lid margin. The result is saved in the patient file.


Evaluation of lipid layer thickness

The colour and structure of the lipid layer are visualised and can be recorded. Measurements are taken of lipid layer thickness, which correlates with tear film evaporation and dry eye symptoms. If the lipid layer is too thin or absent, the tear evaporation rate and tear film instability increase.


Evaluating the particle flow characteristics

A video recording with up to 32 images per second, permits observation of tear film particle flow characteristics and shows tear film viscosity.

OxiMap® – Visualising Oxygen Transmissibility


Professional patient consultation

The cornea needs oxygen, and a good oxygen supply is therefore fundamental for the comfort of contact lens wearers. New materials used for soft contact lenses offer excellent oxygen transmissibility. This can be demonstrated using the new OCULUS OxiMap® display. You can easily show these colour maps to your patients in order to better explain your contact lens recommendation.

How much oxygen really reaches the cornea?

Until now, oxygen transmissibility values could only be given in reference to the center of a -3.00D contact lens – OxiMap® shows oxygen transmissibility as a function of lens material and lens thickness. OxiMap® is available for the most frequently sold spherical soft contact lenses. This convenient tool assists you in consulting with customers to select the most suitable contact lens.

Clear and comprehensive visualisation is key to ensuring patient loyalty

Contact lenses act as a potential barrier to oxygen transport even when the eyes are open. Long hours of wearing comfort can only be guaranteed with a sufficient oxygen supply. OxiMap® shows the oxygen transmissibility of contact lenses on a colour scale to depict the international recommendations for daily, extended and continuous wear.


Basic Software


Overview and 3D Displays

The built-in keratometer guarantees utmost measuring precision and reproducibility of the real K values. The overview display shows the keratometric values, central radii, corneal astigmatism, eccentricity and corneal diameter. The colour topography map shows the curvature of the anterior corneal surface.

Fourier Analysis

Fourier Analysis is an important tool for visualising the degree of corneal irregularity. The topography map is divided into individual components for this purpose. The first three are standard components that represent lower order aberration while the fourth map shows the degree of corneal irregularity or higher order aberration.


Zernike Analysis

Zernike Analysis provides a means to describe specific irregularities of the cornea. An elevated aberration coefficient indicates a decline in retinal image quality. Zernike Analysis makes it possible to determine the exact position of the apex.


The Indices Display facilitates quick and easy detection of topographic abnormalities. The measured values are compared with a standard database. If keratoconus is present, it is detected at an early stage and classified according to topographic findings. The Indices Display is helpful in determining during follow up examinations whether irregularities are changing or remaining constant.


Optional pupillometry software measures pupil reaction to light with and without glare. The reaction of both pupils can be compared to detect anisocoria.

Contact Lens Fitting

Contact lenses are recommended on an individual basis and displayed in a list. Prior fluo image simulation can The contact lens can be rotated and moved around, tracked automatically by the simulation. The integrated and expandable database contains all customary types of contact lenses and is updated on a regular basis. The user can determine the order in which contact lens manufacturers appear.