First of all, I love my DexCom. It has changed my life, especially while cycling. I have been an athlete most of my life and the Dexcom has prevented me from getting low. I was disappointed that the G4 is so difficult to see in the sun. I can barely read the number and cannot tell which direction the arrows are going without stopping and trying to find some shade(not always convenient when your racing). It seems the more high tech they make the screens on pumps and CGM, the harder it is to read in the sunlight. Any ideas?

Views: 331

Replies to This Discussion

I have the same problem with the Animas Ping pump screen. I find wearing polarized sunglasses makes it worse. I hope that better screens will be possible in the near future. My iPhone is easily visible in the sun! That being said, this technology (Ping + G4) makes my life better.

...and if things go according to the (Dexcom) plan, the next rev will be running on your iPhone instead of a separate device. We shall see. In any case, I think it's a ways out since the G4 just came out. I have no ideas for you on the sun/screen thing, sorry. It is a pain.


This post is a few months old, but I think it's a very important problem with the Gen4. I was hiking today and couldn't for the life of me read the BG number. There wasn't a lot of available shade, but with my hand shielding it and a little bit of shade, I couldn't see the number. I knew that I must be low because I can always see the white and yellow numbers and if I couldn't see it, it must be red for low. I use Transitions lenses in my glasses and I have to admit that I didn't think of taking them off to see if it made a difference. But IMO this is a serious problem.
The last post in this thread was by me in March. I am still surprised that I see so little about this subject.

Now that all of us are almost through the first summer of owning the G4, has anyone else had experiences with not being able to see the numbers (especially the red ones) in bright sunlight?

Yes, I deal with this everyday. I like to walk 2-4 miles every day. I monitor my BGs on the Dex as I walk. It is a poor screen in bright light. I need to be able to shade it just so. I have this same problem with my Ping pump.


I don't have as much problem with the Ping because most of the information uses white text and numbers. Of course I'm checking my Dex frequently and my pump less often.

Hi Laddie -

I have experienced the same problems, but unfortunately it is a matter of how expensive the technology is to have an easily-readable screen in direct (or indirect) sunlight. Cell phone manufacturers put a lot of money into research and development of the physical screen itself, the software that can dynamically change the brightness of the screen, and various other factors to ensure that it is easy to see the screen in the sun, and even so some of the most expensive cell phones are difficult to see. I just think that sunlight readability is sadly not on the top of Dexcom's list of "must-have" features when designing the G4. I think it would bump up the price even more, and the type of screen used is most likely not conducive to that type of technology anyway. At that point you are going into the luxury end of mobile electronics, and a medical device has many many other things to consider before they can start including expensive upgrades to the physical components that are usually reserved for only top-of-the-line smartphones and tablets.

The major issue is that I can see the white very easily and the yellow somewhat less easily. It's the red that I cannot see at all, so the solution just might be to not have the numbers in red.

You're probably right that it doesn't make sense for Dexcom to invest huge amounts of money to change the screen.

Thanks for responding.

No problem. That is frustrating about the red text - perhaps changing the color would help, or making the number more prominently large on the screen when low. I think I'd like a little more easy glance-ability in the low ranges anyway.

I'm not sure anyone suggested this yet, but for me I have a lot of problems seeing my bg number in the sun (especially when it's low, the number is red which is almost unreadable for me in any light). Anyway, what I do is:
Goto menu by pressing center key,
Press 'Enter BG'
This will give you your current BG reading in a larger white text (no arrows, but atleast you can see your current bg reading).

just remember to hit back key (the left key) after viewing your bg number, so you don't enter a new one, accidentally.

I can't believe with all the FDA testing they were not aware of the readability issue for us diabeters - the leading cause of blindness)- just a thought.

I am not seeing any issues reading the displays, yes I do need to shade a bit in bright sunlight but its still readable for me.

It could be possible that the bright sunlight impact is also made worse by partial colour blindness ?, just a thought.




From the Diabetes Hands Foundation blog...

Helmsley Charitable Trust Renews Support for DHF

HELMSLEY CHARITABLE TRUST GRANTS SUPPORT TO DIABETES HANDS FOUNDATION FOR FOURTH YEAR  Funding in 2015 to support major transitions in programs and leadership at Diabetes Hands Foundation BERKELEY, CA: February 18, 2015 – The Leona M. and Harry B. Helmsley Read on! →

Spare A Rose, Save A Child for Valentines Day

Here’s a new way to celebrate Valentines Day: Buy a dozen roses, spare the cost of one (about $5) and donate to IDF’s Life for a Child program. By doing this, you will help children in need of life saving insulin. Those of Read on! →

Diabetes Hands Foundation Team


Melissa Lee
(Interim Executive Director, Editor, has type 1)

Manny Hernandez
(Co-Founder, has LADA)

Emily Coles (Head of Communities, has type 1)

Mila Ferrer
(EsTuDiabetes Community Manager, mother of a child with type 1)

Mike Lawson
(Head of Experience, has type 1)

Corinna Cornejo
(Director of Operations and Development, has type 2)

Desiree Johnson  (Administrative and Programs Assistant, has type 1)


Lead Administrator

Brian (bsc) (has type 2)


Lorraine (mother of type 1)
Marie B (has type 1)

DanP (has Type 1)

Gary (has type 2)

David (has type 2)


LIKE us on Facebook

Spread the word


This website is certified by Health On the Net Foundation. Click to verify. This site complies with the HONcode standard for trustworthy health information: verify here.

© 2015   A community of people touched by diabetes, run by the Diabetes Hands Foundation.

Badges  |  Contact Us  |  Terms of Service