Many patients tell us the same thing: “The lines disappear so quickly.” The answer is simple: they are supposed to.
ForeseeHome is designed to monitor your central vision at home between regular visits with your eye doctor. It uses a technology called Preferential Hyperacuity Perimetry, or PHP, to look for small visual changes over time.
To understand the test, it helps to know a little about the macula. The macula is the part of the eye responsible for sharp, central vision; the vision you use for reading, recognizing faces, and seeing fine detail. Because age-related macular degeneration (AMD) affects the macula, ForeseeHome focuses on checking that important central area of vision.
During the test, you look at the center target while small, dotted lines briefly flash on the screen in different areas of your central vision. One part of the line is intentionally made to look a little uneven, like a tiny bump or wave. Your job is to move the mouse and click where you saw that bump or wave.
The lines appear very quickly for a reason. Showing them only for a brief moment helps keep your eyes centered and allows the test to capture your visual response more accurately. Even though each line only appears for a fraction of a second, the device is checking many different points in your central vision during the test.
Unlike a traditional Amsler grid, the ForeseeHome test is designed to check different points in your central vision during each test. This information is used to track changes over time. That is one reason the test may feel different from other at-home vision checks you may have seen before.
Your eyes and brain are naturally very good at noticing tiny irregularities in lines. ForeseeHome uses that ability to monitor for subtle changes that may be important to track over time. As you continue testing, the system builds your personal baseline and looks for statistically significant changes compared to that baseline.
After each test, your results are securely sent to the Notal Vision Monitoring Center and made available to your doctor. If a statistically significant change from your baseline is identified, that information is shared with your doctor to help guide the next steps in your care.
Even if the test feels repetitive or fast, each click plays an important role. By testing regularly, you are helping your care team keep a closer watch on your vision between office visits.
