# Glowing (eye) pupils in black light **URL:** \ **Category:** Factual Questions\ **Created:** [January 27, 2005, 10:31am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899 "2005-01-27T10:31:36Z")\ **Posts on this page:** 20\ **Page:** 3
**Author:** ![naita](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/naita/32/5862_2.png) [@naita](https://boards.straightdope.com/u/naita)\ **Post date:** [January 19, 2017, 10:31am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/41 "2017-01-19T10:31:27Z")
> [@deniseblair](#): > > I am 54 and my pupils glow under black light too. My intuition tells me it is yeast overgrowth/candida. Are any of you redheads? Just curious. Redheads are from another planet. Maybe that’s it. yeast overgrowth/candida is most often a nonsense alt.med. diagnosis. Especially when diagnosed through “intuition”. That said, welcome to the Straight Dope. The discussion you’ve entered is old, and no one seem to have cared about the couple of previous resurrections, so don’t expect any replies to your question. ---
**Author:** ![Mangetout](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mangetout/32/19_2.png) [@Mangetout](https://boards.straightdope.com/u/Mangetout)\ **Post date:** [January 19, 2017, 10:52am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/42 "2017-01-19T10:52:08Z")
IANAD but I’m of the opinion that a yeast infection **inside** the eyeball seems like it would be a pretty damn serious thing. ---
**Author:** ![Dorjan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dorjan/32/12440_2.png) [@Dorjan](https://boards.straightdope.com/u/Dorjan)\ **Post date:** [January 19, 2017, 3:38pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/43 "2017-01-19T15:38:34Z")
Do you have green eyes, by any chance? - EDIT - Argh, did not realize this was a zombie thread. ---
**Author:** ![jtur88](https://avatars.discourse-cdn.com/v4/letter/j/e9c0ed/32.png) [@jtur88](https://boards.straightdope.com/u/jtur88)\ **Post date:** [January 19, 2017, 3:49pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/44 "2017-01-19T15:49:09Z")
> [@robotic\_panda](#): > > Hmmm… well I really don’t think its cataracts, i’m only 22. . Cataracts usually develop in one eye earlier than the other, so there is a simple self-diagnostic test. Look at a blank wall or surface of light tan color, alternately, with each eye. If the color is noticeably different in one eye than the other, that could be an indicator of cataract development. ---
**Author:** ![Splennie](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@Splennie](https://boards.straightdope.com/u/Splennie)\ **Post date:** [January 15, 2018, 11:18pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/45 "2018-01-15T23:18:06Z")
My eyes also glow in black light. I’ve wondered if it’s because I have neurological Lyme disease. Have you found out anything else about this? ---
**Author:** ![Splennie](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@Splennie](https://boards.straightdope.com/u/Splennie)\ **Post date:** [January 15, 2018, 11:19pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/46 "2018-01-15T23:19:13Z")
And btw I also have green eyes … although I’m not sure why that’s was asked - ?? ---
**Author:** ![Elli3sky3](https://avatars.discourse-cdn.com/v4/letter/e/958977/32.png) [@Elli3sky3](https://boards.straightdope.com/u/Elli3sky3)\ **Post date:** [October 3, 2018, 11:40pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/47 "2018-10-03T23:40:45Z")
Idk why and no one can answer me but when I stand underneath a blacklight my eyes glow neon green on neon green eyes or people would think my eyes where light violet underneath a blacklight. So I get 2 responses.i found that t depends on my mood. I don’t have green eyes. I’m actually a dark skinned Latina with dark brown eyes that happen to glow underneath those lights. I do wish to find out why this is the case. ---
**Author:** ![moonglow](https://avatars.discourse-cdn.com/v4/letter/m/91b2a8/32.png) [@moonglow](https://boards.straightdope.com/u/moonglow)\ **Post date:** [March 7, 2020, 6:07am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/48 "2020-03-07T06:07:25Z")
Hi there re florescent green glowing within the pupil under black light or UV flashlight. Human pupils should not fluoresce green under UV light. I understand that this is some kind of an eye implant. The government & military does experiment on a certain percentage of the population. I have this also. Its not the whole pupil but circular green glowing within part of the pupil. Its creepy & I didn’t consent to being altered or experimented upon. You guys might want to look deeper into this. ---
**Author:** ![moonglow](https://avatars.discourse-cdn.com/v4/letter/m/91b2a8/32.png) [@moonglow](https://boards.straightdope.com/u/moonglow)\ **Post date:** [March 7, 2020, 6:09am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/49 "2020-03-07T06:09:26Z")
see # 48 ---
**Author:** ![moonglow](https://avatars.discourse-cdn.com/v4/letter/m/91b2a8/32.png) [@moonglow](https://boards.straightdope.com/u/moonglow)\ **Post date:** [March 7, 2020, 6:14am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/50 "2020-03-07T06:14:32Z")
[quote=“Feli, post:39, topic:286899”] [QUOTE=oliver777; I as well, have this glowing of my eyes. I am 34, and am healthy. No diabetes or cataracts (just had an eye exam for new glasses) and no contacts. I don’t know its genetic, because my two children don’t have it.[/QUOTE] see # 48 ---
**Author:** ![moonglow](https://avatars.discourse-cdn.com/v4/letter/m/91b2a8/32.png) [@moonglow](https://boards.straightdope.com/u/moonglow)\ **Post date:** [March 7, 2020, 6:20am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/51 "2020-03-07T06:20:44Z")
> [@robotic\_panda](#): > > I have been wondering this for quite a while. When my eyes are exposed to a black light, a common, flourescent tube type, my pupils glow greenish blue. When my friends and I discovered this, we tried in every way to recreate it, with all of them, but I was the only one with the Glowing Pupils. The only way we ever duplicated the effect was with my friend’s cat, and her eyes glowed exactly the same. We never had another cat to try it with, and I still wonder to this day, why? > Why do my pupils glow in flourescent black light, and no one else’s? > If you can try this on yourself, or a cat, report back… I just want to know why. see # 48 ---
**Author:** ![LeCee](https://avatars.discourse-cdn.com/v4/letter/l/2acd7d/32.png) [@LeCee](https://boards.straightdope.com/u/LeCee)\ **Post date:** [August 1, 2020, 1:10am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/52 "2020-08-01T01:10:44Z")
Do you have a negative blood type? ---
**Author:** ![feistione](https://avatars.discourse-cdn.com/v4/letter/f/aeb1de/32.png) [@feistione](https://boards.straightdope.com/u/feistione)\ **Post date:** [September 13, 2020, 8:28pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/53 "2020-09-13T20:28:18Z")
I have blond hair and green eyes. My pupils glow in blacklight as well. I had no idea that they did until I was told that mine were the only ones glowing out of the 40-50 people in our vicinity. ---
**Author:** ![Crazyjack76](https://avatars.discourse-cdn.com/v4/letter/c/a3d4f5/32.png) [@Crazyjack76](https://boards.straightdope.com/u/Crazyjack76)\ **Post date:** [May 15, 2022, 1:40pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/54 "2022-05-15T13:40:56Z")
I have glowing pupils under a black light also. Some guy told me I have cat eyes and I didnt know what he was talking about. Then a few weeks later I was at a nightclub and my girlfriend pointed it out and then took a photo of it. I was the only person in the nightclub that had glowing pupils. Maybe its leftover caveman genetics. Lol ---
**Author:** ![Senegoid](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/senegoid/32/6606_2.png) [@Senegoid](https://boards.straightdope.com/u/Senegoid)\ **Post date:** [May 16, 2022, 2:53am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/55 "2022-05-16T02:53:26Z")
So now we know that several posters on this Board are cats. On the Internet, nobody knows you’re a cat. (Unless you out yourself.) ---
**Author:** ![CookingWithGas](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/cookingwithgas/32/485_2.png) [@CookingWithGas](https://boards.straightdope.com/u/CookingWithGas)\ **Post date:** [May 16, 2022, 3:26am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/56 "2022-05-16T03:26:46Z")
> [@robotic\_panda](#): > > my pupils glow greenish blue IANAD but as I understand it the pupil is a hole. Which can’t glow. So it was either the lens or something behind it reflecting back out through the pupil. (Red eye in photos is from light reflecting off the blood vessels in the tissue behind the retina.) ---
**Author:** ![engineer\_comp\_geek](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/engineer_comp_geek/32/504_2.png) [@engineer\_comp\_geek](https://boards.straightdope.com/u/engineer_comp_geek)\ **Post date:** [May 16, 2022, 6:19pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/57 "2022-05-16T18:19:17Z")
> [@Crazyjack76](#): > > I was the only person in the nightclub that had glowing pupils. You should probably get your eyes checked. As was already mentioned upthread, that might be an indication of cataracts, diabetes, or some other health issue. > [@CookingWithGas](#): > > IANAD but as I understand it the pupil is a hole. Which can’t glow. So it was either the lens or something behind it reflecting back out through the pupil Almost certainly the lens, I would think. ---
**Author:** ![2023](https://avatars.discourse-cdn.com/v4/letter/2/db5fbb/32.png) [@2023](https://boards.straightdope.com/u/2023)\ **Post date:** [January 10, 2023, 12:00pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/58 "2023-01-10T12:00:29Z")
Hey, searching this topic and came across this thread…did you ever find out the cause? I have the same, we must be the same species 😅 ---
**Author:** ![Dgermany](https://avatars.discourse-cdn.com/v4/letter/d/dc4da7/32.png) [@Dgermany](https://boards.straightdope.com/u/Dgermany)\ **Post date:** [November 8, 2023, 9:13am UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/59 "2023-11-08T09:13:23Z")
I don’t know if this is exactly what you are describing but some might find this interesting, as far as eye fluorescing under a black light…. [https://www.lsop.colostate.edu/wp-content/uploads/sites/6/2021/07/eyelensfluorescence.pdf](https://www.lsop.colostate.edu/wp-content/uploads/sites/6/2021/07/eyelensfluorescence.pdf) ---
**Author:** ![Darren\_Garrison](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/darren_garrison/32/92_2.png) [@Darren\_Garrison](https://boards.straightdope.com/u/Darren_Garrison)\ **Post date:** [August 7, 2025, 11:43pm UTC](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899/62 "2025-08-07T23:43:52Z")
Sure, Jan. [Previous page](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899.md?page=2) [Next page](https://boards.straightdope.com/t/glowing-eye-pupils-in-black-light/286899.md?page=4)