1) CapNYS for Windows
 2) iCapNYS for iPhone
 3) aCapNYS for Android
 We provide the following three applications.

1) Nystagmus & Head-Position Capture Software (CapNYS) / for Windows

Version 8.6 (Unicode Version) – December 22, 2025

When upgrading from CapNYS versions 8.5 or earlier (multibyte versions), you will be asked to delete the configuration file (CapNYS_config.ini) and the database file (CapNYS_list.txt). Nystagmus video files are not deleted. These two files will be automatically recreated with Unicode encoding at the first startup. You can select either the English or Japanese version during installation.

CapNYS_Setup_x64.exe (52MB) → Download

Overview

This software overlays head-position information as head-position animations onto infrared nystagmus camera videos. By connecting a medical infrared nystagmus camera system to a PC using devices such as Digizo, you can record nystagmus videos and head position simultaneously.
Head position can be entered using the keyboard or mouse. If you build your own motion sensor device, head position can be input automatically.
Built-in motion sensors in smartphones can also be used. On iPhone, install the iCapNYS app; on Android, install the aCapNYS app. Both apps are free and transmit sensor data via Wi-Fi.

Head-Position Input Method 1: Mouse, Numeric Keypad, Keyboard


The image above shows the screen during manual-mode examination. Using a mouse or touch screen, you can select one of the nine frames to input the head position shown at the upper right. Either a sitting-position marker or a supine-position marker can be displayed in the upper-left corner of the head-position animation.
Head positions can also be entered using the numeric keypad. If a numeric keypad is not available, the keys [7 8 9 u i o j k l] can be used.


The person wearing the mask presses the numeric keypad. The head-position animation (sitting mode) is overlaid in the upper-left corner of the video.

Head-Position Input Method 2: Motion Sensor Device

By attaching the motion sensor device (How to build the device) to the infrared camera, head-position data can be captured automatically.


The device consists of an MPU6050 motion sensor connected to an Arduino Pro Micro. Both components together cost approximately ¥1,000.

Head-Position Input Method 3: Smartphone

By installing iCapNYS on an iPhone, the built-in motion sensor can be used. On Android devices, please install aCapNYS. From the CapNYS menu, select the head-position input method Gyro (phone-WiFi). The IP address of the PC running CapNYS will be displayed. Enter this address into iCapNYS or aCapNYS.

2) Nystagmus & Head-Position Capture App (iCapNYS) / for iPhone

iCapNYS / Version 4.3 – March 6, 2024

This is an iPhone port of the Windows version CapNYS.exe. Head-movement animations are generated from the iPhone’s motion sensor data and overlaid onto eye-movement videos. Recorded videos are saved in the iCapNYS album and displayed as a list on the top page. Tap an item to play it, or swipe left to delete it. Videos can also be managed using the iPhone Photos app.
Both the front and rear cameras can be used.
When using the front camera, stable images can be obtained even by hand, but better results are achieved using a simple cardboard holder as shown below.


When using the rear camera, the iPhone is fixed using goggles made with a 3D printer. Illumination is provided by an LED light from Daiso. The iPhone is fixed using double-sided gel adhesive tape. When using these goggles, set the cropping mode to “Crop 2”. The 3D data for the fixture can be downloaded here.


The two videos below were recorded using the front and rear cameras. The head is moved from lower right to lower left in the supine position. Recorded with an iPhone 12 mini; the rear camera provides clearer images.



Below is the Apple App Store download page for iCapNYS. If you are viewing this page on an iPhone, please tap the QR code.


EyeRec, iFrenzel

The iCapNYS app supports both front and rear cameras. We have developed EyeRec (front camera only) and iFrenzel (rear camera only) by extracting each function from iCapNYS. The operation has been simplified as much as possible.

3) Nystagmus & Head-Position Capture App (aCapNYS) / for Android

aCapNYS / Version 1.2 – August 26, 2024

This is an Android port of the iPhone app iCapNYS. Head-movement animations are generated from the Android motion sensor and overlaid onto eye-movement videos. Videos are displayed as a list on the top page. Tap an item to play it, and long-press to delete it.
Both the front and rear cameras can be used.
Please follow the same recording procedures as described for iCapNYS above.

Below is the Google Play Store download page for aCapNYS. If you are viewing this page on an Android device, please tap the QR code.