Related Experiment Videos
[Fundus-oriented perimetry. Evaluation of a new visual field examination method for detecting angioscotoma]
U Schiefer1, G Stercken-Sorrenti, T J Dietrich
1Universitäts-Augenklinik, Abt. II, Tübingen.
Klinische Monatsblatter Fur Augenheilkunde
|August 1, 1996
Summary
This new fundus-oriented perimetry method adapts visual field testing to individual patient anatomy, improving detection of small visual field defects like angioscotomata.
Area of Science:
- Ophthalmology
- Medical Imaging
- Visual Science
Context:
- Conventional automated perimetry uses fixed grids, limiting adaptability to individual patient conditions and follow-up studies.
- Existing methods struggle to account for unique anatomical variations in fundus imaging.
- This restricts the efficiency and precision of visual field examinations.
Purpose:
- To introduce a novel, patent-pending method for fundus-oriented perimetry.
- To adapt perimetric grids to individual patient fundus images for enhanced accuracy.
- To improve the detection of subtle visual field defects, including angioscotomata.
Summary:
- A new software-based method superimposes an individually corrected perimetric grid onto a patient's fundus image.
- The system allows for translational shifting of the foveola and uses rotation/zoom to align the blind spot with the optic disc.
- Stimuli can be spatially concentrated or tested more frequently in regions of interest, and delicate positions can be avoided.
Impact:
- Fundus-oriented perimetry enables the detection of minute angioscotomata by using a morphologically adapted arrangement of stimulus locations.
- This method enhances the precision of visual field testing, particularly for detecting vessel-related defects.
- Demonstrated detection of angioscotomata in 54% of normal subjects, with sensitivity reduced by up to 12 dB.