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Comment by seemaze | Hacker News Reader

I've found it much easier to increase your viewing distance for an equivalent effect. All else being equal this provides the additional benefit of reduced eye strain from a decrease in parallax.

For example, I've settled on ~160 PPI viewed at 100cm as my optimal desktop solution. It has an identical perceived pixel density as ~220 PPI viewed at 75cm.

Use a PPD (pixel per degree) calculator to find a setup that suits your needs: https://qasimk.io/screen-ppd/

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I was forced to do this as my eyes have aged and I can't focus at 5K 27" at a reasonable distance, and can't read the text when I sit far enough back to focus. Hence why 4K 27" (~160 ppi) has become perfect for me.

Would be nice if Apple supported non-integer scaling so I could just dynamically resize everything (without the current technique and performance hit/blurriness of upscaling then downsizing).

I'm pretty sure your 4K is 28 inches, not 27 inches. 4K 27 inch panels don't exist. That still puts you at 157PPI though.

Edit: it looks like 27 inch is really a thing now and not some sort of labelling trick:

    Monitor Size (Diagonal)  Width (approx.) Height (approx.)               Width (Metric) Height (Metric)
    27-inch (26.9" actual) 23.5 inches 13.2 inches 59.7 cm 33.6 cm
    28-inch (27.9" actual) 24.45 inches 13.43 inches 62.09 cm 34.13 cm

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