The Reliability You Expect.
With a New Look.
The Twinfield® 3 is the latest addition to the renowned line of high-quality bowl perimeters from OCULUS, setting new standards for visual field examinations. Whether managing glaucoma, clarifying neurological disorders, or preparing an expert opinion, the Twinfield® 3 offers reliable solutions for all these challenges!
- Redesigned software with a modern design –
compatible with data from Twinfield® 2 and Twinfield® - Intuitive examination guidance – step by step with progress bar display
- Improved ergonomics – even easier patient positioning
- Patient Instruction Audio – save time and overcome language barriers
Our software with a fresh new look
Twinfield® 3 impresses with a modernized user interface and a clear, contemporary design. Operation is now even more intuitive – for faster, more efficient work. Experience how easy powerful software can be!
The new software is compatible with data from the previous models Twinfield® 2 and Twinfield®, so no historical data is lost.
Benefit from almost 70 years
of development experience in perimetry!
The new Twinfield® 3 joins the historic series of high-quality bowl perimeters from OCULUS.
It sets new standards for visual field examinations! OCULUS perimeters have always impressed with their sophisticated technology and high-quality standards.
Diagram and Functions
Improved ergonomics
The chin rest adjusts automatically, making it even easier for you to position your patients.
Tablet mount
Also available with a modern tablet mount as an option.
Well-designed solutions
Practical drawer for storing slim rim trial lenses (full-aperture lenses) – safely stowed away and always within reach. The hand switch is stored directly on the device.
Save time with audio instruction
The voice output efficiently prepares your patients for the measurement. By choosing from several available languages, you save time and reduce language barriers – for a smooth workflow in everyday practice.
Kinetic perimetry
Maximum flexibility
Kinetic perimetry uses moving light points to measure the visual field. During the examination, the patient focuses on a central fixation point while the examiner moves the light stimulus from the periphery to the center at as constant a speed as possible. The patient indicates when they first perceive the stimulus. This allows lines of equal light sensitivity, known as isopters, to be determined. Among other things, this method can be used to determine the outer limits of the visual field. It is particularly useful for expert opinions or neurological diagnostics. Manual or assisted control allows the examination to be performed flexibly and reproducibly.
Manual kinetics
The manual positioning and movement of the stimulus enable a genuine manual kinetic examination according to Goldmann, which is also approved for expert opinions (e.g., blindness assessments or FeV). All test sizes from I to V according to Goldmann are available for this purpose.
Assisted manual kinetics
Assisted manual kinetics makes your tasks easier during the examination. First, you define the desired distances for the movement of the test point. The movement of the test point is then computer-controlled at a constant speed and is therefore independent of the examiner. This increases the reproducibility of the findings.
Application of assisted manual kinetic perimetry: after measuring the isopter V 4e, the segments for the stimulus I 3e are set.
Scotoma mapping
Scotoma perimetry supports the repeated and systematic examination of visual field defects, for example by specifically scanning the blind spot.
Fully automated kinetic
Fully automatic kinetic test enables time-optimized, reliable examinations. It can be combined with static examinations to perform quick screening tests of the entire visual field.
Scotoma mapping: the blind spot is scanned in 8 different directions using the stimulus I 4e.
Glaucoma in focus
OCULUS threshold tests
For regular visual field examinations of glaucoma patients, Twinfield® 3 offers a wide range of examination programs with threshold-determining test strategies.
Threshold strategies provide a complete description of the visual field. The numerical sensitivity values collected can be clearly evaluated statistically and used for quantitative progress monitoring.
For a smooth workflow in everyday practice, the most frequently used examination programs can be conveniently saved in a list of favourites for quick selection.
SPARK – precision and speed in one strategy
The SPARK threshold strategy was developed specifically for the requirements of glaucoma diagnostics. The physiological relationships of the photoreceptors along a retinal nerve fiber bundle enable very fast and extremely precise measurement of sensitivity values in the central visual field.
The visual field is measured in four phases in a maximum of three minutes per eye. The first relevant preliminary results are available in about 40 seconds.
Due to the short examination time and high repeatability of the results, the SPARK threshold strategy is ideal for quantitative monitoring of glaucoma progression. Multiple, more readily accepted visual field examinations allow relevant changes in sensitivity values to be detected more quickly. This enables clinical decisions on treatment to be made in a more targeted and timely manner.
Other proven examination strategies
The CLIP strategy (Continuous Light Increment Perimetry) is a very fast threshold strategy, with a great acceptance among patients. The continuously increasing brightness of the stimulus offered leads to a positive response more quickly. This shortens the examination time and increases patient satisfaction.
The OCULUS Fast Threshold is a very common examination strategy that is usually preferred due to its significantly shorter examination time compared to the classic 4/2 threshold strategy.
Suprathreshold testing strategies are popular because they shorten the duration of the examination and are more readily accepted by patients. The OCULUS class strategy assigns local sensitivity values to several classes, while the 2-zone and 3-zone strategies provide a simplified but clinically relevant overview of the visual field.
The glaucoma display
Make quick decisions
Cumulative defect curve
The cumulative defect curve is an alternative graphical representation of the deviations. It provides an overview of the entire visual field and allows quick differentiation between local and diffuse defects.
Intuitive classification of defects:
the Glaucoma Staging System (GSS 2)
The Glaucoma Staging System graphically classifies the measurement results based on the values of perimetric indices such as the mean deviation and the pattern-related standard deviation (MD and PSD).
Assessing risks:
Glaucoma Staging Program (GSP)
This unique evaluation module provides valuable support in the early detection of glaucoma and the assessment of findings. The GSP classification has been optimized to best correspond to the assessments of glaucoma experts. In addition to classifying the results, GSP is also able to assess the risks of different stages of glaucoma based solely on the visual field findings.
its ability to identify both glaucoma suspect patients and patients with possible pre-perimetric glaucoma based on the measured threshold values.
Quantitative progression analysis
The quantitative assessment of visual field changes is performed by simultaneously analyzing various parameters. The progression analysis is based on the Threshold Noiseless Trend method, which recognizes the significance of the changes and quantifies the losses through the annual change in the MD value. Essential for glaucoma management!
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Technical Data
Static Perimetry
| Programs | Glaucoma, macula, neurological, driver’s license regulation screening Static-kinetic screening and user-defined tests |
| Test Patterns | Physiological patterns (Area 1-8), orthogonal patterns (30-2. 24-2, 30×24, 10-2), Esterman, user-defined patterns |
| Strategies | Threshold Strategies: OCULUS Fast Threshold, Full Threshold (4/2) Optional: SPARK strategy, CLIP strategy Suprathreshold strategies: OCULUS Class Strategy, 2-zone, 3-zone, defect quantification |
| Speed | Adaptive, fast, normal, slow, user-defined |
| Fixation Control | Through central threshold, Heijl-Krakau (using the blind spot), live video image |
| Perimeter Bowl Radius | 300 mm |
| Max. Eccentricity | 90° (full field) |
| Stimulus Sizes / Stimulus Colour | Goldmann I-V / white, blue, red |
| Stimulus Duratio | 200 ms, user-defined |
| Stimulus Luminance Range / Steps | 0 – 3180 cd/m2 (0 – 10 000 asb) / 1 dB |
| Background Luminance / Background Colour | 10 cd/m2 / white | 100 cd/m2 / yellow |
| Optional reports | Glaucoma Staging Program (GSP), Threshold Noiseless Trend (TNT) progression report |
Kinetic Perimetry
| Measurement Methods | Automatic: Examination along meridians with freely selectable distances, Optional: Goldmann manual kinetic testing including: – Computer mouse freely moveable stimulus – Assisted kinetic testing along manually defined path – Scotoma mapping |
| Stimulus Speed | 2° / s (Goldmann standard) or user-defined |
Technical data
| Patient positioning | Motorized chin rest synchronized with adjustable forehead rest |
| Device dimensions (W x D x H) | 748 x 592 x 787 mm (29.4 x 23.3 x 31.0 in) – without table |
| Weight | 29 kg (without table and computer components) |
| Max. power consumption | 45 W (without table and computer components) |
| Voltage / Frequency | 100–240 V AC / 50–60 Hz |
| Recommended computer configuration | Intel® Core™ i5, 500 GB SSD, 8 GB RAM, Windows® 11, Intel® HD Graphics |
| Recommended screen resolution | 1920 x 1080 pixels (Full HD) |
| Interface | USB-A, USB-C |
| Software | Device control, patient management, backup and printing software (Windows®), integrated network operation, easy EMR integration, DICOM (optional) |
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