FREY ADVANCED VISUAL FIELD ANALYZER
AP-300
Perimeter AP-300 is a modern and innovative Visual Field Analyzer that meets global standards for excellence around visual sensitivity testing, diagnosis and management of eye disease. Perimeter AP-300 as a visua field analyser platform of advanced diagnostics uses Kinetic and Static Perimetry, including white/white perimetry, blue/yellow (SWAP – Short wavelength automated perimetry) and Flicker (critical flicker fusion perimetry) for early glaucoma detection plus real Goldmann Kinetic Perimetry. The device offers a visual field wide range of strategies, fields and test parameters. Built-in camera provides automatic visual field analyzing control of patient fixation. Built-in data analysis include regression analysis of the visual field on the basis of historical examinations and standardized ways of presenting and printing test results. Intuitive perimeter software allows easy operation and is designed to be operated using the touch screen. Visual field analyser AP-300 design includes built-in high quality PC computer.
AP-300 DETAILS
Visual Field Analyzer AP-300 combines the features of static and kinetic parameters, offering a rich set of diagnostic techniques. Advanced application software provides unique functions analysis of patient results, making diagnosis easier and faster. Standard presentation of patient perimetry results allow the user to print a single test and present clinical changes in the visual field over time.
Kinetic perimetry is performed using stimuli of varying size, color, intensity and speed of movement (according to the standard adopted for kinetic perimetry). A single test can consist of up to 8 Isopters. For each isopter, individual stimuli parameters can be assigned, which broaden and enhance diagnostic range, enabling an improved clinical assessment.
Static perimetry Blue-On-Yellow, presented by blue stimulus size V by Goldmann on a yellow background, enhances earlier diagnosis of glaucoma. A rich library of built-in test fields and strategies improves accuracy of diagnosis and documents changes in the field of view of the patient over time.
Visual Field Analyzer AP-300 can perform tests using static stimulus of different size and color. The stimulus can vary from size I to V according to Goldmann standard for white, blue, green or red. By default, the proposed stimulus is white III.
Tests can be performed within standard testing area covering various ranges of angular field of view (up to 80 degrees for one eye). There are fields with concentric arrangement stimuli (i.e. Macula, 22 °, 30 °, 50 °, driving Wide, Glaucoma, Peripheral) or the rectangular system (i.e.. 10-2, 24-2, 30-2). The built-in editor allows the user to define specific tests of the test field. It is also possible to test the central vision (optional Fovea).
The unique technology targeted perimetry allows the user to load previous fundus images and select area requiring investigation, and the perimetry examination will be focussed on the designated area. This technology allows for faster and more accurate examination of the area of interest.
Patients with large defects in the visual field or fields significantly deviating from the standard perimeter examination, can experience fatigue due to length of the examination. Pattern calibration is designed to improve the comfort of these patients and significantly reduces examination time. Pattern calibration technique can reduce examination time significantly by more than five minutes.
Visual Field Analyzer AP-300 can be used in both small offices and large clinics. With built-in networking capabilities, installation of the device is very easy with system expansion economical. Visual Field Analyzer AP-300 can easily communicate with devices connected directly or network printers and servers. Perimeter software can be installed on any number of computers, allowing users to organize efficient and effectively patient workflow across any clinical practice.
The resulting sensitivity of the field of view can be presented in many forms, including numerical gray scale, scale, color, scale, dot or a three-dimensional map. Presentations can represent absolute values in decibels, hill view, deviations from the standard age and curve defect (Bebie). Visual Field Analyzer AP-300 software allows the user to print the results in the form of a standard map 7 in 1 (7 result presentation on one side), or other formats are available for user preference and editing.
Strategies include fast screening (Screening, Neurological), accurate strategies threshold (Threshold, Fast Threshold, Smart Threshold) and a number of additional strategies (Constant, Zone 2, Zone 3, Quantify Defect, Binocular, strategies binocular drivers). Accuracy and clinical relevance of the results of the examination can be significantly affected by patient fatigue. Visual Field Analyzer AP-300 software is complemented by advanced algorithms to allow to shortened examination times while maintaining accuracy and clinical relevance.
Accuracy of the examination is controlled by parameters such as exposures false positive, false negative exposure, verify the position of the optic disk method Heijl-Krakau method or automatic control of fixation (digital tracking of the eye). Additionally, adaptive adjustment of the speed of stimulus presentation, depending on the patient’s response can be optioned and implemented by the user which can significantly improve the clinical examination.
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Device type |
Automated perimeter |
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Measurement bowl type |
Hemispherical 300mm radius with difusive surface
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Maximum temporal range (degrees) |
80° |
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Stimulus |
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Stimulus duration |
0.1 – 9.9s |
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Stimulus size |
I-V |
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Stimulus intensity |
0.03asb to 10000asb in 15 3dB or 45 1dB steps
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Visual field testing distance
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30cm |
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Background illumination |
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Fixation control |
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Test models |
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Test field library |
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Correction glass diameter
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38mm
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Kinetic perimetry |
up to 8 izopter |
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Chinrest |
Electrically driven in horizontal and vertical axis
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Computer |
Touch screen support |
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Printer |
External or network printer
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Additional software features
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Dimensions |
Height: 637mm |
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Weight |
18kg |
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Power requirements
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Voltage 110-230VAC |
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Regression analysis module allows user to track changes in field of vision in time, using easy for interpenetration graphs. Multiple examination results of the same patient can be used for the analysis. Regression curves can be presented i absolute dB values, in relation to hill of vision or age normative values or particular global parameters like PD or AD. Analysis of the data can be limited to particular area of vision field like periphery or center, or can cover entire tested field of vision.
Easiest method to visualize changes between two examination results of a patient is Compare function available from the software. Differences between recorded values may be presented in many ways.
To better visualize relation of vision field defects and retinal image, Fundus overlay function allows to import fundus image and then use it as a background for displaying values recorded during the examination. Proper position of fundus image in relation to perimetry data is achieved by selecting macula and blind spot on fundus picture.
Test field editor allows user to create their own test fields specific for particular requirements. For faster creating new test field it starts with predefined ones, like 30-2.
Migrate easily examination data to AP-300 from HFA device. Import functions accepts files stored in xml and pdf formats.
The unique technology targeted perimetry allows the user to load previous fundus images and select area requiring investigation, and the perimetry examination will be focussed on the designated area. This technology allows for faster and more accurate examination of the area of interest.
User interface of Perimetry application is designed to suport efficient work with minimum time spent on switching between options. It’s ergonomy and simplicity assures short learning time for the operator. The application is ready to be operated with use of touch screen or with mouse and keyboard depending on user preferences.
AP-300 can be used in both small offices and large clinics. With built-in networking capabilities, installation of the device is very easy with system expansion economical. AP-300 can easily communicate with devices connected directly or network printers and servers. Perimeter software can be installed on any number of computers, allowing users to organize efficient and effectively patient workflow across any clinical practice.
Export/Import module of Perimeter software is designed to allow the user transfer examination data between remote locations. Data may be exported in proprietary format or in compatible with EMR systems DICOM format.
Automatic backup file generator frees the operator for creating copies of examination data. Auto-backup function can start automatically with period and in location defined by the user. This function assures safety of patient records.
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