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Keratograph 5M

The multi-purpose topographer for contact lens fitting an dry eye screening.

  • The built-in keratometer and automatic measurement ensure the utmost accuracy and reproducibility
  • Find the cause of dry eye syndrome quickly and reliably
  • Choose the ideal lens from the large contact lens data base
  • HIGHLIGHTS
  • SOFTWARE
  • FAQ
  • TECHNICAL DATA
  • Service
  • CONTACT

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.

OCULUS Keratograph 5M

JENVIS Pro Dry Eye Report

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, non invasive tear film break-up time, bulbar redness and a short questionnaire.

JENVIS Pro Dry Eye Report

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.

JENVIS Pro Dry Eye Report

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.

Contact Lens Fitting

Professionalism through innovation

Aside from topography and topographic keratoconus screening, the Keratograph 5M provides a large contact lens data base and many analyses for daily practice.

Contact Lens Fitting

Quick, precise and clear

The built-in keratometer and automatic measurement ensure the utmost accuracy and reproducibility. After completing the measurement, the overview display provides a detailed outline.

Contact Lens Fitting

Find the ideal lens

An ideal lens is chosen from the large lens data base and is then suggested in the Lens Fitting display. Based on this topographic data, a simulated fluorescein image of this particular lens is created. You can then take real fluorescein images with the Keratograph 5M and compare them with the simulated images

Software

The heart of the Keratograph 5M

Quick, precise and clear
Fourier Analysis
Zernike Analysis
Topographic Keratoconus Screening
Follow-ups provide reliability
Reliable Diagnosis Documentation
Precise Measurements Instead of Rough Guesses
Pupillometry
Professionalism through innovation
Combine quick screening with well-founded measurement and loyalty-building counselling
Screening for a Quick Overview
Individualized – Impressive and Complete
Follow-up – Retain Customers by Monitoring their Success
NIKBUT
Meibo-Scan
R-Scan
Oxygen Transmissibility of Soft Contact Lenses Made Visible
Aside from topography and topographic keratoconus screening, the Keratograph 5M provides a large contact lens data base and many analyses for daily practice. The built-in keratometer and automatic measurement ensure the utmost accuracy and reproducibility. After completing the measurement, the overview display provides a detailed outline.
The refractive power of the front surface of the cornea consists of different components. The Fourier Analysis identifies four of them which are shown in the following displays:

  • Spherical component
  • Decentration
  • Regular astigmatism
  • Irregularities

Pathological changes can be quantified and possible effects on visual acuity can be explained.

Zernike polynomials are adapted to the elevation data of the cornea, which is crucial for locating the apex. The apex position is labelled with a cross. This display shows you if a back toric contact lens is applicable to the particular case. Zernike polynomials and the aberration coefficient give you important indications of the imaging quality of the corneal surface. Abnormal values are marked in colour.
Keratoconus classification is based on numerous parameters. The Topographic Keratoconus Screening display merges these parameters. The coloured label illustrates abnormal values. Temporal changes of the parameters are shown side by side in a table, to facilitate your follow-ups. The Amsler classification system is applied to the keratoconus domains.
Follow-ups require comparison of several examinations. In doing so, changes can be easily detected and fully documented. Regular follow-up examinations provide reliability and increase the trusting relationship between you and your patient. The Keratograph software contains both data and image documentation.

Comparing Examinations
With the Compare 4 Exams display you can now compare up to four examinations. Changes from the first to the latest measurement can easily be displayed, reflecting the course of disease over time. Select the examination that you wish to compare (A, B, C, D) with only two clicks and see the results right away – independently of the curvature type. The easy-to-understand display helps you describe even complex matters to your patient.

The resulting classification from corneal staining requires well-trained examiners. It is difficult to estimate the number of hyper-fluorescent dots on the corneal surface, but the integrated JENVIS Grading Scales facilitates this evaluation. Every image taken can be compared with a sample image on the screen. Vessel injections can also be evaluated and documented in this way.
The Keratograph 5M is the ideal device for your professional documentation. The imaging software includes features such as

  • magnification function
  • hand tool
  • measuring tool
  • angle measurement

Pathological changes can be exactly localized, and changes in size can be determined. This ensures that all of your patients questions will be answered.

Using the “Pupillometry” option is a quick and easy way to measure the pupil size of your patients under different illumination conditions. This option not only supports you when fitting multifocal lenses, but also when measuring the optical zone before refractive or cataract surgery.
An ideal lens is chosen from the large lens data base and is then suggested in the Lens Fitting display. Based on this topographic data, a simulated fluorescein image of this particular lens is created. You can then take real fluorescein images with the Keratograph 5M and compare them with the simulated images.
Find the cause of dry eye syndrome quickly and reliably. The 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.
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, non invasive tear film break-up time, bulbar redness and a short questionnaire.

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

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.

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 non-invasive Keratograph break-up time (NIKBUT) measures tear film stability. The NIKBUT is automatically measured within seconds, without fluorescein application. Human eyes are not able to perceive infrared illumination. Glare and reflex tear secretion are therefore avoided during the examination. This visualizes the results in an easy and undestandable way for you and your patients.
The Tear Map shows the affected areas: The respective break-up time is graphically illustrated for each Segment in seconds and according to the principle of a traffic light.
Evaluation of Lipid Layer
Hyper-evaporative dry eye is easily overlooked when using conventional tests. Thus evaluating the lipid layer of the tear film is even more important. With the Keratograph 5M you can record videos of interference patterns of the lipid layer. Distribution characteristics, morphology and thickness of the lipid film can be continuously evaluated.
Tear Film Dynamics
The tear film contains numerous particles. These can be made visible using a specific light source. These particles are distributed in the tear fluid from Bottom to top during each blink. The velocity of these particles provides information on tear film viscosity. You can quickly and easily evaluate the quantity and movement of these tear film particles using the TF-Scan.
With the Keratograph 5M, even difficult examinations such as meibography can be carried out easily. It visualizes meibomian gland dysfunction (MGD), the most common cause of dry eye disease. Morphological changes in the glandular tissue of the upper and lower eyelid are shown. Up to four images from examinations of the same eyelid can be compared in a single display to assess the patient’s progress.

JENVIS Grading Scales
These four-point grading scales allow easy classification of MGD based on an individual meibography. Reference-state images assist in classifying the gland structure as normal or indicative of mild or severe MGD.

Previously, conjunctival redness evaluation was subjective and varied depending on the examiner‘s qualifications. With the R-Scan it is possible to objectively classify bulbar and limbal redness fully automatically. The R-Scan detects vessels in the conjunctiva and evaluates the degree of redness. The automatic classification saves you laborious comparison and gives you more certainty in your asessment.

Bulbar and Limbal Redness
Different display options help to classify the degree of redness. Choose between camera image, view of fine vessels in the conjunctiva, red-free or contrast-enhanced display. Bulbar and limbal redness are evaluated in the temporal and nasal areas and all results are saved automatically.

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!

Easy-to-Understand Patient Education
The oxygen transmissibility (Dk/t) depends on the material the contact lens is made of and on its thickness. In the past, only the manufacturers’ specifications about the oxygen transmissibility in the center of a -3,00 D contact lens were available. With the OxiMap®, you now get a graphic visualization of the Dk/t values over the whole area, based on the lens thickness.

The Dk/t values are colour-coded, whereby black represents an oxygen supply lower than that present in a closed eye. To preserve the integrity of the cornea when wearing contact lenses, minimum Dk/t values are recommended based on the length of time the contact lenses are to be worn. The OxiMap® colour-coding is based on these international recommendations.

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.

Device
OCULUS Keratograph 5M - Topographie (Schnell, präzise, verständlich) OCULUS Keratograph 5M - Fourier-Analyse OCULUS Keratograph 5M - Zernike-Analyse OCULUS Keratograph 5M - Topographisches Keratokonus Screening OCULUS Keratograph 5M - Bilddokumentation (Schaffen Sie Vertrauen) OCULUS Keratograph 5M - Imaging Software (Sichere Befunddokumentation) OCULUS Keratograph 5M - Imaging Software (Messen statt schätzen) OCULUS Keratograph 5M - Pupillometrie OCULUS Keratograph 5M - JENVIS Pro Dry Eye Report OCULUS Keratograph 5M - Screening (ein schneller Überblick) OCULUS Keratograph 5M - Report (individuell, beeindruckend und vollständig) OCULUS Keratograph 5M - Follow-up (Kundenbindung durch Erfolgskontrolle) OCULUS Keratograph 5M - TF-Scan OCULUS Keratograph 5M - Meibo-Scan OCULUS Keratograph 5M - R-Scan OxiMap®: Sauerstoffdurchlässigkeit weicher Kontaktlinsen visualisieren

Title

Description

Features

Measurements With Placido Ring Illumination

White ring illumination is used to measure thousands of points on the corneal surface. Infrared ring illumination is also available for analyzing the tear film in order to prevent reflex tear secretion caused by glare.

LED Measurements

The Keratograph 5M proudly offers the perfect illumination for each function: White diodes for tear film dynamics, blue diodes for fluorescein images and infrared diodes for meibography.

FAQ

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”.
The differences between fluorescein TFBUT and NIKBUT values should be noted, although positive correlation between TMH and Schirmer test values has been reported.
White areas are displayed if the patient blinks before 15 seconds after the measurement started. This does not affect the measurement in any way.
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.
No, the area being analyzed during the NIKBUT measurement usually doesn’t coincide with the area affected by the nose shadow.
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.

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 eyes with small lid aperture or eyes with ptosis, (commonly seen in the older Asian population), the device cannot detect the conjunctival area correctly.
The particles are a combination of eroding corneal epithelial cells, tarsal conjunctival cells and small air-particles.
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.
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.
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.
Yes, data from the NIKBUT, R-Scan and all keratometric data can be exported to csv files.
Yes, with the 22 Placido disc 22.000 real measured data points are generated after each measurement. None of these are extrapolated measurements.

No, a keratometer is included in the hardware measuring real Ks of the anterior surface.

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. A Pacido topographer can’t measure the posterior cornea on its own.

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.
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.

Technical Data

Accuracy ± 0,1 D
Reproducibility ± 0,1 D
Number of rings 22
Working distance 78 – 100 mm
Number of measuring points 22000
Camera Digital CCD camera
Light source Placido illumination: white diodes
Placido illumination: infrared diodes (880 nm)
Imaging illumination: blue diodes (465 nm)
Meibography: infrared diodes (840 nm)
Tear film dynamics: white diodes
Pupillometry illumination: infrared diodes (880 nm)
Dimensions (W x D x H) 275 x 320 – 400 x 480 – 510 mm
(10.8 x 12.6 – 15.7 x 18.9 – 20.2 in)
Weight Measuring head: 3.2 kg (7.1 lbs)
With xy base: 6.1 kg (13.5 lbs)
Max. power consumption 18 W
Voltage 100 – 240 V AC
Frequency 50/60 Hz
Recommended computer specifications Intel® Core™ i5, 500 GB SSD, 8 GB RAM, Windows ® 11, Intel® HD Graphics

Service

Downloads / Whitepapers / Publications

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

Date: 11.2021

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

Date: 05.2021

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Questions?
Get in touch with us.

Tel. +49 641 2005-800

Unsere Topographen im Vergleich

OCULUS Keratograph 5M
OCULUS Keratograph 4
OCULUS Easygraph
Keratograph 5M Keratograph 4 Easygraph
Topographie
Übersichtsdarstellung
Farbdarstellungen
4 Farbdarstellungen wählbar
Kamerabild
3D-Darstellung
Fourier- und Zernike-Analyse
Topographisches Keratokonus Screening
Höhendarstellung
Asphärizität
Kontaktlinsen-Anpassung
Untersuchungen vergleichen
Messung Kontaktlinsen-Rückfläche
Imaging
Bild- und Videodokumentation mit Fluobildaufnahmen
Nahteilhöhenmessung
Lidwinkelmessung
manueller Aufnahmemodus
JENVIS Pro Dry Eye Report
JENVIS Pro Dry Eye Report Software (Aufnahme- und Auswertesoftware zum Trockenen Auge)
TF-Scan (Beurteilung der Lipidschicht, der TF-Dynamik, Messung der Tränenmeniskushöhe und der nicht-invasiven Tränenfilmaufrisszeit (NIKBUT))
R-Scan (Automatische Klassifizierung des bulbären und limbalen Rötungsgrades)
Meibo-Scan (Meibographie des Ober- und Unterlids)
Pupillometrie
Untersuchung der Pupillenreaktion mit Pupillogramm, Asymmetrie-Test und manuellem Messmodus
Oximap®
Graphische Darstellung der Sauerstoffdurchlässigkeit (Dk/t-Wert) weicher Kontaktlinsen
Technische Daten
Messbereich 3 bis 38 mm, 9 bis 99 dpt 3 bis 38 mm, 9 bis 99 dpt 3 bis 38 mm, 9 bis 99 dpt
Genauigkeit ± 0,1 dpt ± 0,1 dpt ± 0,1 dpt
Reproduzierbarkeit ± 0,1 dpt ± 0,1 dpt ± 0,1 dpt
Ringzahl 22 22 22
Arbeitsabstand 78 bis 100 mm 80 mm 40 mm
Anzahl der ausgewerteten Datenpunkte 22 000 22 000 22 000
Kamera Farbkamera SW-Kamera
Abmessung (B x T x H) 275 x 320 bis 400 x 480 bis 510 mm 275 x 320 bis 400 x 490 bis 517 mm 119 x 102 x 216 mm
Gewicht 3,2 kg (Messteil) / 6,1 kg (mit xy-Tisch) 2,3 kg (Messteil) / 5,3 kg (mit xy-Tisch) 730 g
Details Details

Legende: ✓ = vorhanden * – = nicht vorhanden *  ⃘  = optional erhältlich gegen Aufpreis