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The OCULUS Keratograph® 5M

The OCULUS Keratograph® 5M is an advanced corneal topographer with a built-in real keratometer and a color camera optimized for external imaging. Unique features include examining the meibomian glands, non-invasive tear film break-up time and the tear meniscus height measurement and evaluating the lipid layer.

Topographer OCULUS Keratograph® 5M

OCULUS Keratograph® 5M

Easy-to-Understand Presentation

Actively integrate the Keratograph® 5M into your consultation. Many easy to understand displays support you in communication and patient education. Use your Keratograph® 5M as a marketing tool to make your services transparent!

Joystick for Keratograph<sup>®</sup> 5M

Installing and using the new joystick


Measurements with Placido Ring Illumination

Thousands of measuring points are used to measure the whole surface of the cornea. A white ring illumination is used for this purpose. An infrared ring illumination is also provided for analysis of the tear film to prevent glare-related reflex secretion.

Technical Data

Accuracy: ± 0.1 D
Reproducibility ± 0.1 D
Number of rings: 22
Working distance: 78 - 100 mm
Number of evaluated data points 22 000
Camera: Digital CCD camera
Light source: Placido illumination: White
Placido illumination: Infrared 880 nm
Fluorescein illumination: Blue 465 nm
Meibography: Infrared 840 nm
Tear film dynamics: White
Pupillometer illumination: Infrared 880 nm
Dimensions (W x D x H): 275 x 320 - 400 x 485 - 512 mm
Weight Measuring head: 7.1 lbs
With base: 13.5 lbs
Max. power consumption 18 W
Voltage 90 - 264 V AC
Frequency 47 - 63 Hz
Recommended computer specifications CPU Intel® Core i5-7600, 8 GB memory, 1 TB HDD, Windows® 10 Pro
Recommended screen resolution 1920 x 1200 pixel

In acc. with the Medical Device Directive 93/42/EEC

The OCULUS QM system is certified in accordance with ISO 13485 and (EU) 2017/745 (MDR).

The OCULUS QM system is certified in accordance with ISO 13485 and (EU) 2017/745 (MDR).


NEW Crystal TEAR Report

Find out the cause of dry eye disease quickly and reliably with the assistance of the new Crystal TEAR Report in the Keratograph® 5M. Carry out a comprehensive analysis using the measurement results as a basis for your diagnosis. All results are summarized in a patient-friendly, neatly arranged printout, enabling you to combine documentation and patient education.

Bring Your Dry Eye Protocol to Life

Benefit from all the advantages of the new Crystal TEAR Report in the Keratograph® 5M: efficient screening, well-founded measurement results and greater patient loyalty. With its preselection of recommendations and the option to manually adapt them, the Crystal TEAR Report allows you to draw up an effective treatment, according to the individual causes of dry eye, in the shortest time. The result: a comprehensive dry eye analysis.

Recording Made Easy

Up to 50 recordings can be carried out easily for documentation purposes. Readily understandable user tips and optimal auto-setting prior to each recording make it possible to delegate the entire measurement process. Despite the high degree of user guidance, you can directly delete faulty recordings as well as change settings and adapt the measurement sequence individually.

Excel With Your Dry Eye Diagnosis

The entire course of diagnosis is documented, providing you with an ideal basis for your treatment decisions. All necessary recordings that are required to grade the individual's dry eye state, can be viewed at the same time. Depending on the grade you obtain, you can then determine a suitable treatment plan.

Additionally, you can enter the data from other tests, such as Osmolarity, Schirmer's Test, Phenol Red Thread Test, and more.

Documentation and Patient Education

The Crystal TEAR Report surely and safely walks you through all the necessary assessment criteria that make up a comprehensive dry eye analysis. To complete the treatment plan, you can manually enter your dosage recommendations for the individual therapeutic measures on the printout. Making it an easy-to-grasp, optimal means of patient education.


The tear film is assessed using either white or infrared illumination. The new high-resolution color camera makes even the finest of structures visible. In addition to NIKBUT (Non-Invasive Keratograph® Break-Up Time) and measurement of the meniscus tear, the TF-Scan can also make an assessment of the lipid layer and the tear film dynamics. Tear film analysis with the OCULUS Keratograph® 5M is non-invasive and is conducted without any additional tools.

Assessment of the Tear Film Break-Up Time

The tear film break-up time is measured non-invasively and fully automatically. The new infrared illumination is not visible to the human eye. This prevents glare during the examination. The TF-scan presents the results in a way that is easy for you and your customers to understand.

Meniscus Tear Height - Assessment of the Tear Film Quantity

Lipid Layer
Assessment of the Interference Phenomenon

The interference colors of the lipid layer and their structure are made visible and can be recorded. The thickness of the lipid layer is assessed based on the structure and color.

TF Dynamics - Assessment of the Particle Flow

Automatic Classification of Redness

Automatic classification of the bulbar redness. Conjunctival redness used to be assessed subjectively and depended on the examiner. The R-Scan is the first module that automatically and objectively documents and classifies the bulbar and limbal degree of redness. The R-Scan detects the blood vessels in the conjunctiva and evaluates the degree of redness. This automatic assessment spares you the time and effort of having to make manual comparisons using classification sheets.

Meibography of the Top and Bottom Eyelid

The multi-functionality of the Keratograph® 5M easily and efficiently integrates difficult examinations such as meibography. The dysfunction of meibomian glands is the most frequent cause of dry eye. Morphological changes in the gland tissue are made visible using the Meibo-Scan and can be classified with the JENVIS Meibo Grading Scales.

Indispensable for:

  • Fitting multi-focal contact lenses
  • Exact determination of the treatment area for refractive surgery
  • Seamless integration into the existing Keratograph® software
  • The infrared camera installed in the Keratograph delivers images of the patient’s pupil, which are used as the basis for the measurements

Different Ways of Determining Pupil Reaction:

  • Examination of the pupil reaction both with and without glare
  • Examination using two different glare stimulus powers
  • Clear presentation of the results in graphic form: pupil changes over a period of time; minimum, maximum and mean pupil diameter, incl. standard deviation
  • Comparison views possible

Imaging Software

The Imaging Software is used to record video and image files. In addition to viewing the videos and single images by themselves, you can also compare the recordings with the simulated fluorescein-images of the measured eye.

How Does That Work?

  • Simply integrate the Imaging Software into the Keratograph® software
  • Blue light-emitting diodes in the illumination beam path stimulate the fluorescein
  • Yellow filters are integrated into the observation beam path

Result: Static fluorescein-images and videos can be recorded under slit lamp conditions!

Fluorescein-image simulation comparison


The OxiMap® presents a color map of the oxygen transmissibility of soft contact lenses based on the lens power, which is easy to understand – even for your customers!

Oxygen Transmissibility of Soft Contact Lenses Made Visible

An intact tear film and a good supply of oxygen to the cornea are an absolute necessity for wearing contact lenses comfortably. The OxiMap® presents a color map of the oxygen transmissibility of soft contact lenses based on the lens power – which even your customers will understand!

Compare Different Soft Contact Lenses!

The OxiMap® is individually adapted based on the lens power and supports you in your consultation with the patient and helps you to choose the most suitable contact lens. New materials used for soft contact lenses provide excellent oxygen transmissibility.

OxiMap® was developed in close cooperation with JENVIS Research and the University of Applied Sciences in Jena.


Dry Eye Examination

Can the NIKBUT measurement be performed even in severe dry eye?

The NIKBUT measurement for dry eye with severe corneal epithelial damage is difficult. Even when the NIKBUT measurement is performed in such cases, the device mostly reports the results as “too short”.

Is the NIKBUT value the same as fluorescein tear film break-up time (TFBUT)?

The differences between fluorescein TFBUT and NIKBUT values should be noted, although positive correlation between TMH and Schirmer test values has been reported.

Why are white areas sometimes displayed in the colour-coded map of the NIKBUT display?

White areas are displayed if the patient blinks before 15 seconds after the measurement started. This does not affect the measurement in any way.

Does abnormal corneal shape i.e. keratoconus affect the NIKBUT measurement?

No, the software detects a basic image. In the case of keratoconus for example the strained Placido rings induced by the condition is noted initially by software and distortions from the original image is recorded and indicated as a break in the tear film. However, in cases with advanced keratoconus or severe irregular corneal astigmatism, it is hard to perform the measurement.

Does the nose shadow affect the NIKBUT measurement?

No, the area being analyzed during the NIKBUT measurement usually doesn’t coincide with the area affected by the nose shadow.

What is important when measuring tear meniscus height (TMH)?

At least three measurement points (nasal and temporal limbus, pupil center) should be selected. To get the right value the ruler has to be placed on the lid margin and measure perpendicular up to the last reflex of the meniscus. Please see image as reference. The correct measurment is 0.22 mm for this example.

Are the meibomian glands graded objectively by the software?

No, however grading scales called the JENVIS Grading Scales for meibomian glands have been included in the software. A sliding bar tool allows for direct comparison of patient results to the grading scale, making meibo grading very easy with the Keratograph 5M.

In some cases, R-Scan evaluating bulbar redness cannot detect the conjunctival area correctly.

In eyes with small lid aperture or eyes with ptosis, (commonly seen in the older Asian population), the device cannot detect the conjunctival area correctly.

What are the particles being observed during the tear film dynamic examination?

The particles are a combination of eroding corneal epithelial cells, tarsal conjunctival cells and small air-particles.

Can data from the Keratograph be exported for research?

Yes, data from the NIKBUT, R-Scan and all keratometric data can be exported to csv files.

Topography/Contact lens fitting

The Keratograph has 22 Placido rings to perform a measurement. Does this generate sufficient information about the cornea?

Yes, with the 22 Placido disc 22.000 real measured data points are generated after each measurement. None of these are extrapolated measurements.

Does the Keratograph measure simKs?

Yes, a real keratometer is included in the hardware measuring simKs of the anterior surface.

Does the Keratograph measure the posterior cornea?

No, the Keratograph is a Placido topographer. Placido discs are projected on the tear film, the software analyzes the resulting images and measurement data of the anterior cornea is generated. No, a Pacido topographer can measure the posterior cornea on its own.

How does the Keratograph aid in keratoconus diagnosis?

Topographic indices for keratoconus screening are incorporated in the software, as well as Fourier Analysis. Objective inspection of the sagittal map is another tool to aid with diagnosis.

The OxiMap® displays oxygen transmissibility of a soft contact lens. Can any lens on the patient’s eye be measured?

No, lenses cannot be individually measured. Well-known soft lenses were analyzed and the information is programmed into the software. The role of the OxiMap® is to educate patient’s on the importance of using lenses with high oxygen transmissibility, showing them the benefits in an easy to understand image. Furthermore the OxiMap® gives information about the oxygen transmissibility over the entire surface of the lens, as well as differences between prescriptions.

Data of various lenses are included in the Contact Lens Fitting display. Can data for other lenses be imported too?

Yes, data from any lens can be manually input if the parameters are known.

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