Whatever happened to …

… the duochrome test?

Huh?

OK, it’s a stretch but last week’s post about red and green exit signs got me wondering. I appreciate the comments and insights from those that chose to respond to the post.

It got me wondering if the red/black combination had more impact than the green/black combination. That led me back to years ago getting my eyes tested. I’ve worn contact lenses or glasses for as long as I can remember so I can’t recall the last time I woke up ready to go, except maybe for bumping into something I couldn’t see!

But, I do remember for years going to my eye doctor and this test was done every time. What looks “sharper” – the green side or the red side?

Now, I always thought that it was silly because black on green always appears sharper than black on red to me.

I did some research here. Holy physics, Batman.

Before you get overly impressed with me knowing the term “duochrome”, I’ll confess. It was easy to find as a result of the internet search “optometrist test red green”. Now, I can sound semi-informed when I visit my optometrist for my yearly check up. Quite frankly, I can’t remember the last time that the duochrome actually came up as part of my checkup.

For a Sunday, check in please..

• Before reading this post, did you know of the word duochrome?
• Do you have a predisposition to black on green or black on red?
• Do you get your eyes checked annually? If not, why not?
• When was the last time you had a duochrome test?
• How many pairs of glasses do you own?
• Do you think that red/black or green/black makes for a better exit sign?

I’d be most interested in your thoughts and insights on this topic. Please share them in the comments below.

This is part of a regular fun series of posts that appear on Sunday morning. They can all be enjoyed here.

The post appeared originally on:

https://dougpete.wordpress.com

If you read it anywhere else, it’s not original.