Glenda, this is for you!
I couldn’t see how to attach a photo in the comments, so here’s an entire post on the egg plate’s optical illusion.
One of the features in the In My Kitchen post this month is an egg plate. The photo shows the plate without any eggs in it which makes the indents look more like convex domes rather than concave indents.
Celia pointed out this is due to monoscopic vs. stereoscopic vision. (One vs two, as in our eyes) It is because of this we have optical illusions.

Plain egg plate, concave or convex?
Do you see indents or domes? I feel like reaching in and pushing them all down! Notice the flowers, are they indented or relief?
And this one?
Here is a link to Celia’s paper dragon that seems to follow you around the room as you move. Again it is due to mono/stereoscopic vision and the camera lens.
Fun!
Do other people have egg plates too?
Related articles
- In My Kitchen, September 2013 (spoonfeast.com)