[MSA-talk] Tips for helping color-blind students with optical mineralogy

Jesse Walters jesse.walters at maine.edu
Fri Oct 20 10:13:18 EDT 2017

Hi Lydia,

Steve beat me to it, but my thoughts  might be still be useful. I was going
to suggest that you can digitally manipulate the birefringence chart and
photomicrographs to see what they would look like to your student. Adobe
Illustrator has a function specifically for this application, and I often
use it to check my figures. Even though Steve provided the charts, it still
might be worthwhile to use this tool on actual photomicrographs.

- Jesse

On Oct 20, 2017 10:04 AM, "Steve Dunn" <sdunn at mtholyoke.edu> wrote:

Hi Lydia,

I learned optics from a color-blind professor, John Longshore at Humboldt
State, and it didn't inhibit him in the slightest.  I also have a son with
strong deuteranopia, so I've given this some thought over the years.  There
are numerous websites that deal with examples, and some will accept
uploaded images and give you back a color-blind version.  Here are examples
of the interference colors as seen by those with severe deuteranopia and
protanopia, along with the original.  Your student can learn to recognize
which color we call first order red, second order blue, etc. As with most
of us, certainty depends on seeing a thinned area or edge where lower-order
colors are revealed so we can "count" up to the grain's maximum
interference color.  John Longshore could always say, for example, "you
would probably call this grain blue-green."  He always nailed it.  Although
his socks didn't always match. :)



On Thu, Oct 19, 2017 at 5:39 PM, Lydia Fox <lkfox at pacific.edu> wrote:

> I am looking for tips to help a color-blind student who is really
> struggling with the optical component of my course this semester.  I’d
> appreciate any ideas you can pass along!
> Lydia Fox
> Lydia K. Fox
> Department of Geological & Enviornmental Sciences
> University of the Pacific | 3601 Pacific Ave | Stockton, CA 95211| p.
> 209.946.2481 <(209)%20946-2481>|
> _______________________________________________
> MSA-talk mailing list
> MSA-talk at minlists.org
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