User:Divenal/sandbox

Welcome, {{#ifanon:anonymous|registered}} user.

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This is a tool that might be useful for distingushing https://endmyopia.org/astigmatic-cylinder-blur-vs-myopic-spherical-blur/

The gaps are intended to be calibrated to 1 minute of arc, equivalent to the gaps in landolt C test. The idea was that directional blur will close some of the gaps, but "blurry blur" will do them all. So when measuring cm's, you can distinguish the two.

Also the distance at which ghosting first appears, if you're also measuring that. For me, the ghosting appears in particular directions, so you can concentrate on the gaps on the lines where the ghost image is most-separated from the original. (ie if ghosting happens in a north-east direction, look at the gaps on the lines going north-west.)

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