[mellonaut]

For those that now find themselves inspired to type the Snellen E, the internet provides an OFL typeface that scratches your itch here¹ (this unclearly licensed modification² even comes with some cute but barely readable lowercase versions of the letters)

1] https://radagast.ca/snellen/snellen.html 2] https://mk.bcgsc.ca/snellen-optotype-font/