Where can I find the eye movement sensor?

Question

Arduino

Please help me find the closed eye movement sensor.
The goal is to track the REM sleep phase.
There are a lot of people on the Internet struggling with this issue, but I could not find anything specific.
Perhaps in this situation, a heart rate tracking sensor like in a smart watch is suitable?

Answer 1

The heartbeat, I think, is tracked in a different way. You can try on the muscle activity of the oculomotor muscles, in principle ... Or look for people who professionally study sleep and ask them how.

Answer 2

Perhaps this is a unique technology, and even if someone has such sensors (and there are developments), then for sure they have a patent and stand like a wing for a Boeing.
In one of the educational programs they talked about reading the movement of the eyes, but it was easier there - the task of reading the movement of the driver's eyes. In the role of a sensor glasses with a built-in camera. Well, the eyes are open. Actually, I think you can read closed ones, but you need to highlight them, etc. etc., the easiest way is probably to ask the doctors, they may know something.

Answer 3

There are no such sensors, at least they are freely available.
And even if it does, it’s clearly not a sensor, but quite a ready-made device.
By the way, there are a lot of projects, google on request like "gaze tracking" (for example geektimes.ru/post/172325/).

Answer 4

It looks like a bunch of IR diodes and a photodiode. This is how heart rate monitors work. Eye movements affect blood flow and eyelid position, and a signal from a photodiode registers this. However, the signal will be noisy, and a tricky algorithm is needed to detect activity.
Alternatively, you can try the sensor from an optical mouse. From it there will be a little more information than from one diode. But you will need to write some kind of ML algorithm to register the movement. However, as for one diode.

Answer 5

The cornea and the anterior chamber of the eye create a noticeable tubercle and are clearly visible when the eye is moved closed by the eyelid to change its topology. I would stick a small marker made of metallized lavsan on the eyelid and catch the reflection of the IR LED. When the eye moves, and, at the same time, when the eyelids tremble, which also characterizes the phase of REM sleep, the position of the mirror will change clearly and within large limits, which will give a high purity of the signal. And the presence of a small number of elements will make the wearable sensor relatively comfortable.

Answer 6

If you want to make an analogue of Novodrimer, then you can try to go around - to determine REM sleep by the absence of body movements. Many programs for smartphones do just that.
It is known that during REM sleep, almost all motor muscles do not work (except for the eye muscles).
And the sensor, even if you do, is inconvenient, and even dangerous - did a person turn over on his stomach and remain without eyes?

Answer 7

Since you do not need to register the direction of eye movement, but it is important to fix the fact itself, then an "optocoupler" is quite enough. Here, for example , you can see a photo report on the assembly of a device for determining FBS (rapid sleep phase). Here are the schematics in pdf, the layout of the boards of this device. So nothing complicated hack your dream as much as you like =)

Answer 8

also interested in the question.
there are miniature motion sensors on ebay, but I'm not sure if they will go for such purposes.
a good example is in wireless mice with economy mode.
turned his microsoft wireless 3000 over - put a piece of paper on it - it burns dimly, but if you move it even a quarter of a millimeter - the diode shines brightly.
I think you can use sensors even from cheap mice along with an IR diode.