"Chromatic Vision Simulator" is a color vision simulation tool which simulates the color vision of color vision deficiencies. This software is developed by Kazunori Asada (Ph.D. medical science and Ph.D. media design), based on the research in color science.
About 5% of men have difficulty distinguishing red and green, or recognizing dark red. Such color deficiency can be classified into three major categories: protanope / Protanomal, Deuteranope / Deuteranomal and Tritanope / Tritanomal.
Color deficiencies are the inability to tell differences between some colors other people can easily distinguish. People with different types of color vision deficiency perceive colors differently. For example, individuals diagnosed as Protan or Deutan cannot perceive differences between red and green, and pink and cyan.
These color visions are predictable by calculating working of the cone cells that perceives the color to some degree.
"Chromatic Vision Simulator" makes simulated images of each color vision type from built-in Camera or Photos and shows you how people with specific types of color vision sees the world in real-time.
- Compare how "Normal Color Vision," "Protanope," "Deuteranope" and "Tritanope" see the same scene, side by side. The screen can be divided into up to four.
- Change the simulation strength from 0 to 100%. You can also check the appearance between normal color vision and dichromacy.
- Switch between Appearance mode and Difference mode. Difference mode shows the difference between the original image and the simulated colors as brightness (the upper limit of the difference is set with the slider). Switch with a one-finger swipe on the toolbar, a two-finger swipe on the screen, or in Settings.
- Turn on "Show Color Name" and the color cursor shows the name of the color at the point you choose ("Systematic Color Name (ISCC-NBS)", "Traditional Color Name (TCCA)", "Systematic Color Name (JIS)" and "Traditional Color Name (JIS)"), together with values such as the Munsell value and CIELAB.
- Works with the rear and front cameras, and with photo files. Pinch to magnify up to 500%.
- Save the screen you are looking at as a photo. You can write the type and strength on the saved image (switch in Settings). You can also save with the volume button.
- On devices with a wide color gamut (Display P3), images are shown and saved in the wide color gamut.
- Works with VoiceOver.
- Works on both the outer and the inner screen of the foldable iPhone (iPhone Duo).
- Available in Japanese and English.
- No network access. Camera images are used only for display on the screen and for saving on your device.
- The theory behind the simulation is published on the website.
https://asada.website/cvsimulator/e/theory.html
I’m color blind, and my daughter is color blind. I first got this when she was younger to help her mother understand what our daughter could see. She has it installed on her iPad, so she can check whether the things my daughter does make sense. The one improvement I would like is to embed an Ishihara, dot pattern test, which would allow you to adjust the gammas, until you can see the shapes, and then invert the adjustments to give folks a look at what the colorblind person really sees. Additionally, once the color blind person has adjusted the gamma values to see the patterns in the dots. There could be a view port the user could use to have a better understanding of what those with normal color vision see. Personally, I’m not “blind” to red and green, but I see only fifteen to twenty-five percent of what a person with “normal color vision” sees. It might be fun to understand why people think things are beautiful.
This is amazing for understanding
AmberJFL
My grandpa is color blind. Has been for about 70 years now. We all worked together to get him color vision glasses. We figured out he cannot see red or green. The whole world looked so shockingly brown and olive almost like a black and white movie with surprising splashes of blue or yellow.We used this to decorate the room, choose our outfits, the cupcakes and even a bright red and green rose. He is VERY stoic and even his wife almost never saw him cry but he did. His comment was “You mean you guys see this ALL the time!? I never knew it was so beautiful.”Use this to understand your family/friends. Then please go get them color vision glasses because it is a beautiful gift that means more than you can imagine. Grandpa is now relearning what colors are called what. This app was a great creations thank you.
Good, but could be improved.
lpetrich
I like it, and I like being able to select more than one kind to display, though it could have simulation of partial color deficiency, maybe with a slider for how much. It might also use some “About…” text popup that explains the app and how to use it.One might also mention simulating dog vision - dogs have red-green color deficiency.
Wonderful! A Picture Is Worth A Thousand Words
seecolorsdifferently
If your color blind and want others to see what you see, this is the app you want to use! Ever since I was a child, I’ve always suspected I was color blind. No one believed me because I can successfully guess the colors about 90% of the time. This wasn’t confirmed until I was 21. Now that I have this app, I’ve used it with my wife, kids, friends and co-workers. Just recently, after taking an Ishihara Color Dot Test, I used this app to show the tester how I see the dots. Absolutely wonderful app!
- Rebuilt from the ground up, with the simulation now based on up-to-date color science.
- New Difference mode: shows the difference between the original and simulated colors as brightness (limit set with the slider). Switch with a one-finger swipe on the toolbar, a two-finger swipe on the screen, or in Settings.
- New Settings screen. Open it with the gear.
- New "Show Color Name": the color cursor shows the name and values of the color at the point you choose.
- Choose in Settings whether to write the type and strength on saved images.
- Save with the volume button. The save sound can also be set.
- Wide color gamut (Display P3) display and saving ("Color Space" in Settings).
- Colors change more naturally when the strength is set in between.
- What is in the middle of the screen stays in the middle when you zoom.
- Double-tap to reset the zoom and position.
- Works with VoiceOver.
- Supports the foldable iPhone (iPhone Duo).
- New button icons.
Version 4.0.0
The developer, Kazunori Asada, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Kazunori Asada
Size
8.1 MB
Category
Education
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
