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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 colour 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 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 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: 3.2 kg (7.1 lbs)
With base: 6.1 kg (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 RAM, 1 TB, 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  JENVIS Pro Dry Eye Report: Your Professional Dry Eye Assistant

Find the cause of dry eye syndrome quickly and reliably. The new JENVIS Pro Dry Eye Report in the Keratograph 5M will help you as you go along. Perform a comprehensive screening, using the measuring results as a basis for diagnosing dry eye syndrome. All results are documented in accordance with the Medical Products Law and summarized for your patient in a neat and easily understandable printout.


JENVIS Pro Dry Eye Software – The Dry Eye Analysis Tool

Make use of all the advantages of the new JENVIS Pro Dry Eye Report in the Keratograph 5M: efficient screening, well-founded measurement results and greater patient loyalty.

Screening for dry eye syndrome should be a routine part of every refraction.

Screening for a quick overview

The four-part screening test quickly and accurately reveals abnormalities in tear film quantity and quality. This 5-minute screening should be carried out routinely before every refraction. The JENVIS Pro tear film screening routine includes measurement of the tear meniscus height, tear film break-up time, bulbar redness and a short questionnaire.

Make a quick and easy decision whether your patient has dry eye symptoms.

Individualized – impressive and complete

The JENVIS Pro Dry Eye Report provides you with a fail-safe test sequence covering all the assessment criteria required for a comprehensive analysis for dry eye syndrome. It provides you with useful hints and optimized, predefined settings to support you in your measurements, enabling you to perform a quick and efficient analysis for dry eye syndrome and document your anterior segment findings.

Get equipped to give your patients specific advice for easing their dry eye symptoms.

Follow-up – retain customers by monitoring their success

You want to know whether your treatment recommendations have been successful? Then use the follow-up function with its setting options for characterizing the initial cause. This will enable you successfully document improvements in your patients‘ tear film condition.

Regular check-ups will make you the go-to specialist for your patients.


The tear film is assessed using either white or infrared illumination. The new high-resolution colour 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 colours 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 colour.

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


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 colour 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 colour 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.


Best Practice: Using the OCULUS Keratograph 5M and JENVIS Pro Dry Eye Report to Diagnose Dry Eye

Author: Dr Jennifer Rayner, Optometrist, BAppSc(Optom), GradCertOcTher(UNSW) Alleve Eye Clinic, Adelaide, Australia

In a perfect world, patients would present with a single, obvious cause for their dry eye and management would be simple, quick and effective. Yet there are often multiple factors that contribute to the presence of dry eye and they need to be identified as contributors for best management. A tool such as the OCULUS Keratograph 5M with specific JENVIS Pro Dry Eye Report software allows for advanced testing to understand the subtleties and complex nature of the ocular surface and tear-film.

OCULUS_Best_Practice_K5M_JENVIS_Rayner_EN_1121.pdf (5.7 Mb)

Case Report: Key Measurements for the Comprehensive Patient Assessment, Management and Education

Author: Dr. Keyur Patel, BSc(Hons) OD, DipTP(IP) DipGlauc DipSpV FAAO FCOptom FBCLA Tompkins, Knight & Son Optometrists, UK

More often than not, patients do not present with a text book case of a single issue. Usually, they have a combination of concerns that may or may not be relevant to each other. In the world of contact lenses, comfort and drop out are often related to a poor ocular surface, rather than the latest generation of contact lens products. This case report demonstrates how multi-tasking tools, such as the OCULUS Keratograph 5M, allow us to investigate multiple issues and concerns in a parallel stream allowing maximum efficiency and outcome.

OCULUS_Case_Report_Topo_Keratograph5M_Patel_EN_Screen_0521.pdf (1.4 Mb)


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.

The JENVIS Pro Dry Eye Report is a comprehensive dry eye report. Does this report diagnose the condition of the eye?

The purpose of the JENVIS Pro Dry Eye Report is to provide the clinician with various dry eye related examinations, improving workflow, aiding in the diagnosis and educating the patient. The clinician uses the results from the JENVIS Pro Dry Eye Report to formulate the diagnosis. Treatment options are included in the software, however these are chosen at the discretion from the clinician. Different treatment suggestions can be manually added.

Various tests are included in the JENVIS Pro Dry Eye Report, does all of the tests need to be performed on every patient?

No. The report is set up to allow clinicians to individualize the screening procedure if they so require. A screening option, consisting only 4 procedures, is also included. This is a good tool to screen every patient entering the clinic. If a problem is detected, more detailed examination with an individualized report can follow.

In which sequence should dry eye tests be performed?

It is important to start from least invasive followed by more invasive tests. The workflow in the JENVIS Pro Dry Eye Report is set up to accommodate this principle.

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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