Heidelberg Edge Perimetry Visual Field Analyzer
Heidelberg Edge Perimetry Able to perform an innovative functional test of the visual system and offers a full range of perimeter examinations capable of providing results equivalent to a dome perimeter.
Heidelberg Edge Perimetry is the new threshold perimeter from Heidelberg Eng. Able to perform an innovative functional test of the visual system. Not just standard automated perimetry (SAP) but also a new early diagnosis test – Flicker-Defined Module (DFF). Now, you will have the best of both worlds in one perimeter.
The Visual Field Exam remains the primary diagnostic tool for providing information on the patient’s visual function and quality of vision. Functional tests support physicians in the early diagnosis of the disease, the staging of the disease, or the analysis of the trend of glaucoma progression.
Heidelberg Edge Perimetry offers the most appropriate test for each stage of the disease. It allows you to provide the right stimulus to the patient in the proper stage of the disease. Flicker-Defined-Form Perimetry The FDF or Contour Illusion “Edge” stimulus helps detect visual field loss in patients with early glaucoma.
A 5-degree circular stimulus is created by a phase inversion of black and white points that flicker in counter-phase to the background points. The flicker creates an illusory edge profile that the patient perceives as a gray spot or circle against the average background luminance.
DFF perimetry correlates with structural defects detected by HRT or SPECTRALIS OCT. Standard Automated Perimetry Standard Automated Perimetry (SAP) or white-on-white perimetry is best suited for patients with moderate to severe progressive disease and thus offers continuity of care.
The HEP-based monitoring system offers a full range of perimeter examinations capable of providing results equivalent to a dome perimeter. The HEP offers a W / W Perimetry using a Goldmann type III stimulus size for 40 dB to 16 dB. From 15 dB to 0 dB, the stimulus size increases following the Goldmann equation to give perceptual equivalence. This unique approach allows for a full range of standard automated tests and ensures good test-retest characteristics.
Heidelberg Edge Perimetry Visual Field Analyzer Features:
Visual field testing remains the primary diagnostic tool to provide information about a patient’s visual function, quality of vision, and quality of life. Functional testing supports clinicians in early disease detection, staging of disease, or trend analysis in progressive glaucoma.
2-in-1 perimetry with HEP offers the most appropriate test for each stage of the disease. It allows you to provide the right stimulus to your patient in the proper stage of the disease.
The FDF stimulus or Contour “Edge” Illusion helps detect visual field loss in patients with early glaucoma. A 5-degree circular stimulus is created by a phase reversal of black and white dots that flicker in counter-phase to the background dots.
The flicker creates an illusionary edge contour that the patient perceives as a gray patch or circle against the mean luminance background. FDF Perimetry has been proven to correlate to structural defects detected by HRT or SPECTRALIS® OCT.
Flicker defined form (FDF) perimetry is an entirely new method for the early detection of glaucoma and is offered only on the Heidelberg Edge Perimeter (HEP).
Standard Automated Perimetry
Standard Automated Perimetry (SAP) or white-on-white perimetry is best suited for patients with moderate to severe progressive disease and offers continuity of care. The HEP monitor-based system offers full dynamic range perimetry and has delivered equivalent results to a projection-type perimeter.
Heidelberg Edge Perimetry offers a unique W/W Perimetry using a Goldmann size III target for the 40 dB to 16 dB range. From 15 dB to 0 dB, the stimulus size increases following the Goldmann equation to give perceptual equivalence. This unique approach enables full-range Standard Automated Perimetry and ensures good test-retest characteristics.
Visual field test (perimetry)
The visual field is the area that is perceived optically while a person stares straight ahead at a fixed point.
A visual field test is a functional analysis that measures whether any deficiencies or restrictions exist in the visual field. The test takes several minutes. The patient is usually placed in a separate quiet, dark room to prevent distraction from noise. Only one eye is tested at a time, while the other eye is covered with an eye patch. The visual field test result dramatically depends on the patient’s cooperation and concentration. This test is frequently tiring and time-consuming for the patient, but it is the only method for actively measuring the visual function.
HEP is a monitor-based perimeter designed to test central and peripheral vision. It offers a complete set of standard tests for the central 10°, 24°, and 30° visual field, as well as an extension to the periphery up to 60° (100 points).
HEP’s Functional Change Analysis (FCA) applies existing knowledge of the random variability of visual field analyses and flags progressive visual field loss that exceeds the normal level of repeatability. FCA is compatible with ASTA Standard and ASTA Follow-Up examinations.
The FCA is the first trend analysis to provide information on a significant change in probability maps for Total Deviation and Pattern Deviation. Easy-to-read symbols indicate a worsening visual field and assist with interpretation. FCA is the only trend analysis that can either monitor slight changes in early disease with FDF Perimetry and long-term follow-up with SAP in advanced glaucoma patients.
The integration of Heidelberg Engineering devices through the joint HEYEX software platform allows for combined analysis of structural damage of the optic nerve head (ONH) or retinal nerve fiber layer (RNFL) and visual field defects. HRT or SPECTRALIS® OCT data can be linked with HEP visual field results to arrive at a conclusive glaucoma diagnosis more efficiently.
- All relevant information on one report
- Automatically generated in HEYEX
- Improved time and patient management
- Facilitates patient education
The Heidelberg Eye Explorer (HEYEX) software platform provides flexible solutions from a solo practice to a large clinic environment. The integrated patient database facilitates the storage and management of image files from all existing Heidelberg Engineering devices, such as SPECTRALIS, HRT, and HEP. Network-viewing software gives easy and reliable access to patient image files on most networked computers, supporting seamless consultation and diagnosis.
- HEYEX is compatible with SPECTRALIS, HRT, and HEP
- Centralized data storage
- Online data access
- Easy retrieval and viewing
- Office efficiency
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