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

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.