OCULUS Keratograph 4
Gold standard corneal topography – that’s what the Keratograph 4 is all about. It ensures reliability when it comes to taking measurements, providing consultation and fitting contact lenses. The Keratograph generates findings you can build on. The integrated keratometer and automatic measurement activation guarantee perfect reproducibility. In this way, the Keratograph 4 also meets highest clinical standards for such procedures as tear film assessment and qualitative cornea analysis. It stands out by virtue of its versatility.
- Taking Measurements with Placido Ring Illumination
The cornea is represented across its entire surface and globally using thousands of measuring points. Precise measurements form the basis for many modes of analysis and representation, such as automatic keratoconus detection and 3D representation of the cornea. - Taking Measurements with the Blue Light Emitting Diode
Previously you may have taken static fluo images and videos using the slit lamp – now you can also do so with the Keratograph 4! Use this function to examine the fit and mobility of contact lenses. - Precise Measurements, Comprehensible Presentation – A Picture Says More Than a Thousand Words
Use the Keratograph 4 as a marketing tool and incorporate it actively into your consultations. With the Keratograph 4 software you can show images which your patients have never seen before. Competent consultation (e.g. during follow-up exams) builds trust and forms the basis for intensive patient loyalty. The Keratograph 4 – not only a measuring instrument but also an ideal marketing tool.
Functions
Topography
The integrated keratometer guarantees highest measurement precision and reproducibility. After measurements have been taken, the comprehensive overview display mode gives you a fast overview.
Contact Lens Fitting
Contact lenses are recommended on an individual basis and displayed in a list. In order to avoid taking more steps than necessary when fitting contact lenses, the fluo image can be simulated beforehand.
OxiMap® – Visualizing the Oxygen Transmissibility
Professional patient consultation
The cornea needs oxygen and a good oxygen supply is fundamental for the comfort of a contact lens wearer.
TF-Scan Makes the Tear Film Visible
This software shows the quality and quantity of the tear film. In cases of dry eye patients and contact lens wearers, the tear film should be examined carefully. Only an intact tear film guarantees contact lens wearing comfort!
Complete Documentation
Follow-ups require comparison of several examinations, so that changes may be easily detected and fully documented. Regular follow-up examinations provide reliability, cultivating a relationship of trust between you and your patient. The Keratograph software includes both data and image documentation.
Fourier Analysis
The Fourier Analysis is an important tool for visualizing the amount of corneal irregularity. Using the Fourier Analysis, the topography map is divided into individual components. The first three are standard components that represent lower order aberration, while the fourth map shows the amount of corneal irregularity or higher order aberration.
Zernike Analysis
Irregularities of the cornea can be depicted clearly with the Zernike Analysis. If the aberration coefficient is elevated, it indicates impairment of the eye’s optical imaging quality. The exact location of the apex can also be identified easily using the Zernike Analysis. The location of the apex is marked with a black cross.
Topographic Keratoconus Screening
Using the Topographic Keratoconus Screening display, topographic abnormalities can be detected and diagnosed with ease. The measurements are compared with normative data. If deviations are found, the measurements are shown in yellow or red, creating a topographic classification.
Software
The heart of the Keratograph 4
Professionalism through innovation
Imaging
Pupillometry
Near-portion Height Measurement
Palpebral Angle Measurement
Tear Film Quality (NIKBUT)
Tear Meniscus Height
Visualizing the oxygen transmissibility of soft lenses
Plain and Comprehensive Visualization Assures Patient Loyalty!
How Much Oxygen Really Reaches the Cornea?
be simulated beforehand. The contact lens can be rotated and moved around. Fluo image simulation is adjusted automatically. 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.
The Keratograph 4 determines the break-up time using the NIKBUT procedure (non-invasive Keratograph break-up time).
Changes in the projected Placido rings (displacement of the ring edges) give an indication of the break-up time of the tear film on the cornea.
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.
The graph shows the percentage of area affected during the measuring period.
Title
Description
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.
Yes, data from the NIKBUT, R-Scan and all keratometric data can be exported to csv files.
Technical Data
| Measurement range | 3 – 38 mm (0.1 – 1.5 in), 9 – 99 D |
| Precision | ± 0.1 D |
| Reproducibility | ± 0.1 D |
| Number of rings | 22 |
| Working distance | 80 mm |
| Number of measuring points | 22000 |
| Camera | Digital CCD camera |
| Light source | Placido illumination: red 650 nm Imaging illumination: blue 465 nm (UV-free) Pupillometry illumination: infrarot 880 nm |
| Dimensions (W x D x H) | 275 x 320 – 400 x 480 – 510 mm (10.8 x 12.6 – 15.7 x 19.3 – 20.4 in) |
| Weight (Measuring head) | 2.3 kg (5.1 lbs) |
| Weight (with base) | 5.3 kg (11.7 lbs) |
| Power Consumption max. | 30 W |
| Voltage | 100 – 240 V AC |
| Frequency | 50 – 60 Hz |
| Minimum PC requirements | Intel® Core™ i5, 1 TB HDD, 8 GB RAM, Windows® 7 – Windows® 10 |
| Recommended screen resolution | 1920 x 1200 Pixel |
Service
Downloads / Whitepapers / Publikationen
ALLE ANZEIGEN
Individuelle Contactlinsenanpassung auf den Punkt gebracht
Datum: 20.03.2011
In der Massengesellschaft mit seinen austauschbaren Produkten haben Individualität und Originalität einen hohen Stellenwert; Unikate sind jedoch für die Mehrheit unbezahlbar. Genau hier setzt APEX an. Die Hornhaut des Menschen ist wie sein Fingerabdruck – unverwechselbar. Mit konsequent individuell angepassten Contactlinsen (CL) im APEX-System werden Sie als CL-Spezialist dieser Unverwechselbarkeit und gleichzeitig Ihrer Verantwortung für das Auge gerecht. Sie können mit APEX eine erste personalisierte AnpassContactlinse (ACL) mit größt möglichem positivem Comforterlebnis anbieten. Qualifiziertes, verantwortungsbewusstes und wirtschaftliches CL-Anpassen bekommt seinen festen Platz.
Contact us!
Request a quote or contact us if you need further information.
Request a quoteContact requestHotline
Questions?
Get in touch with us.
Tel. +49 641 2005-800
Unsere Topographen im Vergleich
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| 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 |
