Severe eye strain and dizziness from font rendering since iOS 26 / 27 (iPhone 16 Pro)

This is not a common complaint.

Readers here are other users like you. If none of them responds, there may not be any well-known work-arounds.

Apple wants you to have a good experience using their products.

So when issue like this arise, the Moderators will eventually urge you to contact Apple, either through Apple Support, or by making a Free appointment to visit the Genius Bar of an Apple-owned store as if you had a display problem (which you very well might).

In addition to the above suggestion to check directly with Apple Support, also check with your medical providers.

Thank you for participating in the Apple Support Community.

We want to make sure you reach the right team for help with your device. We recommend that you contact Apple Support directly. Depending on your region, you may be able to reach them here: Get Support.

Your complaint is not one commonly seen here.

AI does not KNOW anything, it can only spout back what arbitrary people are saying on the Internet. AI has no respect for expertise, just quantity. AI does not verify that others are talking about the same types of phones, same Hardware, same MacOS.

¿Have you had your Hardware evaluated at the Genius Bar of an Apple-owned store?

Your physical symptoms sound serious. Large numbers of others are not reporting such serious problems.

¿Have you had your vision-related symptoms checked by a competent Ophthalmologist?

I too facing the same problem since ios 26 updates,the issue of sub pixel rendering has not been addressed.And whenever this issue is raised, the response given is to contact an eye doctor.

This is not our eye issue,it's software based issue, which has to be tackled at the company's end.

Contact Apple and also send Feedback if you wish.

• Contact Apple Support - Apple Support
• Feedback - iPhone - Apple

Don't ignore health issues for any reason and don't rely on the internet for health advice. The installed user base is about 1.5 Billion across 2.5 Billion active devices announced by Apple in January. There is no breakdown for the number specifically with iOS 26 or greater, but you could expect that to involve a huge number of users who are not experiencing any problem. If you think about it, a bug in the OS that resulted in a condition like that across all users would be the top story of every news outlet.

Have you been evaluated for cataracts?

Do you have dry eye disease?

Do you have map-dot-fingerprint dystrophy of the cornea?

I did not make those up. Those are all eye problems I have personally been treated for, and until an expert told me I had them, I had no idea.

Your observation is very sharp. This is because Apple enabled an overly aggressive screen-sharpening algorithm starting with iOS 26.1, as part of its Liquid Glass rendering engine. The smoothing algorithm is used alongside the sharpening algorithm to remove the noise and artifacts introduced by sharpening, which corresponds to the “artificial softness” you mentioned.

Since iOS 26.0 received a large number of complaints from users about the screen looking blurry and text being difficult to read, Apple introduced a much more aggressive sharpening algorithm starting with iOS 26.1.

You can compare an iOS device side by side with a PC or Android device (but don't use a TV for comparison, since TVs also apply a lot of image post-processing). When displaying the same image, the edges and contours in the image on an iOS device are noticeably sharper than those on a PC or Android device.

By the way, this algorithm was actually introduced as early as iOS 13, but it was disabled in iOS 16, re-enabled in iOS 17, and then disabled again after iOS 17.6.

The solution is to search for “iPhone Feedback” or “iPad Feedback” and find Apple's official feedback website. You can report this issue to Apple as a bug. Alternatively, you can submit it as a feature request and ask Apple to provide a toggle that allows users to turn the sharpening algorithm on or off.

<< I turned on "Increase Contrast", "Reduce Transparency", and pushed the new Liquid Glass slider all the way to the right. >>

You should also try enabling

Settings > Accessibility > Display and Text size > Reduce White Point

...and adjust the slider that appears to try to obtain some relief.

... and while you are there make text Larger -- as large as you can tolerate.