Topographer KERATOGRAPH 4

The Keratograph 4 Topographer - Superior Corneal Topography.

This device ensures reliable measurements for accurate consultations and the fitting of contact lenses. Its integrated keratometer and automatic measurement activation guarantee perfect reproducibility, meeting the highest clinical standards for procedures such as tear film evaluation and qualitative analysis of the cornea.

This device stands out for its versatility, offering a variety of measurement methods. It uses Placido ring illumination to map the cornea's entire surface with great precision. Thousands of measurement points form the basis for many analyses and representations, including automatic keratoconus detection and 3D cornea representation. Additionally, the Keratograph 4 also allows measurements with a blue light-emitting diode (LED), enabling the examination of contact lens fit and mobility.

Key benefits include quick and contactless measurements, optimal hygiene, and efficient time management. It also allows for precise and reliable diagnostics, detecting even early changes on the corneal surface. For corneal surgeries, the Keratograph 4 provides reliable pre- and post-operative measurements.

The integrated preview screen ensures the highest measurement accuracy and reproducibility. After measurements, the comprehensive representation mode offers a quick overview, displaying essential parameters such as central radii, K values, corneal astigmatism, eccentricity, and corneal curvature. Additionally, the color topographic representation makes it easy to detect and measure irregularities on the camera image.

The 3D mode clearly displays the corneal curvature, allowing for the visualization of the cornea from different angles. Fourier mapping and Zernike analysis are essential tools for visualizing corneal irregularities and determining the optical imaging quality of the eye.

The "Indices" option facilitates the detection of topographic anomalies by comparing measurements with normative data. Anomalies such as keratoconus can be detected early, which is crucial for effective monitoring.

The Keratograph 4's software also allows for the assessment of the quality and quantity of the tear film, essential for patients with dry eye and contact lens wearers. You can display the individual quality of the tear film using color maps and measure the tear film quantity non-invasively.

Finally, the Keratograph 4 simplifies patient consultations by showing the oxygen transmissibility to the cornea using the OCULUS OxiMap function. This feature easily shows patients the oxygen transmissibility based on the contact lens material and thickness, thus helping to choose the most suitable contact lenses.

• Measurement range: 3–38 mm, 9–99 D

• Accuracy: +/- 0.1 D
• Reproducibility: +/- 0.1 D

• Number of rings: 22

• Working distance: 80 mm

• Number of measurement points: 22,000

• Camera: digital CCD camera

• Source of illumination: Placido illumination (red 650 nm), imaging illumination (blue 465 nm without UV), pupillometer illumination (infrared 880 nm)

• Dimensions: 49–51.7 x 27.5 x 32–40 cm
• Weight: approximately 6.8 kg

• Power supply: 100-240 VAC, 50-60 Hz