A method to simulate how people with poor eyesight see using an iPhone camera is becoming a hot topic. It seems you can also replicate presbyopia.
This could be useful and interesting for reviewing sign displays.

I have poor eyesight (around 0.05) and presbyopia. This really is how it looks.

In Life Vision, we pay a lot of attention to text, but itʼs amazing how much is actually hard to see...
(Life Vision: A service provided by DENSO that delivers information from municipalities and communities.)

We usually create blur layers in Figma to check UI impressions, but if this simulation is accurate, we could create blur layers that approximate poor eyesight or presbyopia for quick UI testing.

There are apps that simulate how people with poor eyesight see, but this method could be a great conversation starter: "Can I borrow your glasses for a moment?" Itʼs a simple and linear way to simulate vision, which is great.

It also seems beneficial for safety considerations and avoiding dangerous designs!

I recently got new bifocals.

The focal distance (or something?) changes continuously in a gradient within a single lens. Normally, when looking far away, it uses the nearsighted part, and when looking at something close by, your gaze naturally shifts downward, using the presbyopia part of the lens.

Itʼs a bit of an awkward UX, as itʼs easier to see when looking down to the lower part of the lens, which is unnatural (although much better than having to take off regular glasses).

I look forward to the invention of lenses that detect what youʼre looking at and adjust the focal distance accordingly.