VisionTest

VisionTest is a linux-based digital visual acuity chart.

Usage

VisionTest can be used with a keyboard or a remote and receiver (recommended)

SC-45

See the SC-45 layout

Buttons

• Screensaver: Puts the device in screensaver mode
• +: Makes the letters one size bigger
• -: Makes the letters one size smaller
• Line: Toggles showing only one row of letters
• SGL: Toggles showing only one letter per row
• Hide: Hides/shows the letter size in the bottom corner
• LTR: Shows letters
• NUM: Shows numbers
• SYM: Shows symbols
• E: Shows Es flipped differently
• Rand: Randomizes the letters on the screen
• 10-400: Shortcuts to jump to letter sizes from 10/20 to 400/20

SH-15

See the SH-15 layout

• Hide: Hides/shows the letter size in the bottom corner
• Up: Makes the letters one size bigger
• Down: Makes the letters one size smaller
• Mode: Cycles through modes (LTR/NUM/SYM/E)
• Line: Toggles showing only one row of letters
• SGL: Toggles showing only one letter per row
• 20-200: Shortcuts to jump to letter sizes from 20/20 to 200/20

BW-7070

BW7070 layout not yet final

Keyboard

• u: One size bigger
• d: One size smaller
• l: Toggle multi-line mode
• m: Change mode (normal letters, numbers, symbols, rotating E)
• s: Toggle single mode
• r: Randomizes lines
• f: Toggle fullscreen mode
• @: Toggle pixel counter
• c: Calibration mode
• +: Make text larger
• -: Make text smaller
• 1-9: Goes up and down to different sizes
• !: Toggles mirroring
• n: Toggles line number

Installation

With script

To install VisionTest with the install script, first download the install script, and put it on the target machine. Now, ensure you have sudo access on the machine, and run it with bash ./linux_install.sh. The script will install dependencies, download VisionTest, and set up all config files automatically.

Manually

To install VisionTest manually, or from a certain version, first download the version you want from the downloads page, and put it on the target machine. Unzip it to the user's home directory. If the version is after commit d60420e, you can just run all of the scripts in scripts/setup/, and VisionTest will be automatically configured. NOTE: you will need to set the receiver_tty variable to the receiver tty (usually /dev/ttyUSB0).

Configuration

See "Ubuntu Calibration/Setup" in the VisionTest Install and Setup Guide

Supported hardware

• PC (recommended): Dell Optiplex 7450 AIO
• PC (supported):
  • Runs Ubuntu 20.04
  • Minimum 1 USB port
  • Ethernet jack or supported WiFi card (for installation and updates)
• Receiver: Celadon RCV-3000 (others may work; VT has only been tested with the RCV-3000)
• Remotes:
  • Celadon SC-45
  • Celadon SH-15 (as of v0.0.2)
  • Celadon BW7070 (as of v0.2.0)