Topic: PHP Tutorial
Download (200) times
Last Download at Wednesday 11th of January 2012 10:52:53 AM
Foresee PHP User Manual
Foresee PHP is a non-invasive, visual field analyzer, used as an aid to monitor
Age-Related Macular Degeneration (AMD) and to provide early detection of
conversion to Choroidal Neovascularization (wet AMD or CNV). Foresee PHP is FDA
cleared (K050350) and clinically validated in clinical trials. Foresee PHP technology
provides excellent accuracy in CNV detection 82% sensitivity ...
The key features of the Foresee PHP system are:
- Full macular field testing of 14° X 14°
- Automated analysis
- Visual field mapping
- Statistically significant correlation with stereo-color fundus photography and fluorescein angiography
- Software upgrade capability for future applications
Foresee PHP technology is based on the well-studied visual phenomenon of hyperacuity. Hyperacuity (also termed "Vernier acuity") is defined as the ability to perceive a minute difference in the relative spatial localization of two or more visual stimuli (see Figure 1-2). The hyperacuity threshold may be as low as 3 to 6 seconds of arc, which is approximately 10 times better than the resolution ability (around 30-60 seconds of arc) in the fovea. The hyperacuity stimuli are highly resistant to retinal image degradation, and thus suitable for assessing retinal function in patients with opaque media as well.
The Baseline Clinical Approach begins with a baseline examination, which must be reliable and within normal limits. This baseline examination serves as a reference for monitoring change in subsequent examinations (using the examination history chart). The patient takes a Foresee PHP test every three months. A change in results from the baseline is a significant event that probably indicates the presence of wet AMD.
...
Source: www.notalvision.com
Related PDF Files
Comments for Foresee PHP User Manual