Reichert 7CR Auto Tonometer with Corneal Response Technology

The Reichert 7CR is a fully automated non-contact tonometer that combines conventional intraocular-pressure measurement with patented Corneal Response Technology®.

During measurement, a controlled air pulse applanates the cornea while an electro-optical system monitors its response. The bi-directional applanation process evaluates corneal behavior during inward and outward movement, allowing the instrument to calculate corneal-compensated intraocular pressure—IOPcc.

According to Reichert, IOPcc is designed to reduce the influence of corneal biomechanical characteristics, including viscoelastic properties and thickness, on the reported pressure measurement. This provides additional clinical information when assessing patients with thick, thin or otherwise biomechanically atypical corneas and patients who have undergone refractive surgery.

Alignment and acquisition are automated. The patient rests against the forehead support, and the operator initiates measurement through the color touchscreen. A one-touch triple-measurement mode obtains multiple readings, while waveform scoring identifies readings that may be less reliable and supports weighted averaging.

The 7CR includes an internal thermal printer and USB data transfer. A motorized chinrest is available separately for practices requiring additional patient-positioning support.

Key Features

• Fully automated non-contact tonometry
• Patented Corneal Response Technology®
• Corneal-compensated intraocular pressure—IOPcc
• Bi-directional corneal applanation
• Real-time monitoring of corneal curvature changes
• Automated alignment and measurement
• One-touch triple-measurement mode
• Waveform quality score
• Intelligent weighted averaging of multiple readings
• Color touchscreen interface
• Forehead-rest patient positioning
• Non-contact air-pulse measurement
• No topical anesthetic required for routine operation
• Internal thermal printer
• USB electronic data transfer
• Optional motorized chinrest
• Measurement range compliant with the published ISO 8612 tonometer standard

Measurement Technology

Corneal-Compensated IOP

IOPcc is calculated from the cornea’s response during bi-directional applanation and is designed to be less influenced by corneal biomechanical properties than conventional pressure measurements.

Waveform Score

Each measurement receives a quality score based on internal signal analysis. Readings below the instrument’s established threshold are identified as unreliable.

Automated Measurement

The instrument automatically performs alignment and measurement after the operator initiates the procedure from the touchscreen.

Real-Time Applanation Control

Reichert states that the system records 400 data samples during the approximately 25-millisecond measurement process to control the applied applanation force.