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- HEP is a full range perimeter, not only a screening-device

- 2 in 1 ; 2 kinds of perimetry in one device :

FDF (Flicker Defined Form) for early glaucoma detection

SAP (Standard Automated White on White Perimetry) for continuity of care

- Diverse strategies /Test algorithms :

- ASTA Standard, ASTA Follow-up, ASTA Fast and Screening

- Test time reduction through ASTA Follow-up ; improved sensitivity by applying thresholds of baseline examination

- Trend analysis for serial visual field analysis (Progression)

- Combination with HRT for conjoint display of structural and functional data (SF-map)