So 19 year olds can see 315nm, but males are better than females.

[dabateman]

Reed got me interested in looking at these studies. This study looked at a larger near age matched population of 19 years olds +/- 1.3 years:

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0199940

 

Males can see 315nm better than females. 

Pigmentation of the eye didn't matter.

The 315nm light was mostly reported as looking a desaturated violet-blue.

People whom wear glasses were less sensitive to detecting 315nm, they were not wearing glasses during the study.

 

That last one I find interesting,  as I have noticed that after doing lots of deep UV photography,  I find myself more uv visual.  As in now I can look at something and almost see the UV pattern off the object. As a learned behavior. 

 

 

[colinbm]

Interesting Dave.
I hope you don't set a trend of people looking at reflected, deep UV 

[dabateman]

If the studies are done, than others don't need to repeat it.

 

This study may have been submitted to the FDA, its validity is unknown to me currently, but it might be what Reed was thinking about:

 https://www.chemie.uni-wuerzburg.de/fileadmin/08020000/user_upload/makula/transmittance.pdf

 

Looking at the loss of 315nm transmission of the removed human lens and spectrometrically measured.

 

 

[colinbm]

I suppose this test is with an excised lens & in a lab with a spectroscope & not what we see with our own rods & cones ?

[dabateman]

50 minutes ago, colinbm said:

I suppose this test is with an excised lens & in a lab with a spectroscope & not what we see with our own rods & cones ?

Actually I can't find this study through official channels.  So take it with a giant grain of salt.

It may have been submitted to the FDA, you can submit anything to the FDA. Like the length of grandma's socks. But might not be relevant. 

I have revised my text above as I don't know if these spectra can be trusted. 

[JCDowdy]

I can assure you the source of the FDA submission is credible.

https://pubmed.ncbi.nlm.nih.gov/?term=Brainard+GC&cauthor_id=8023464&size=200