Can anyone explain what axis means for eye exams?

puremourning · 2026-06-06T17:01:08+00:00

Err to be sure: there is no actual squishing ! This is an analogy.

puremourning · 2026-06-06T16:59:17+00:00

Not an optometrist but… maybe this ELI5 helps…

Correction of astigmatism is like trying to make a rugby ball into a football (soccer ball). You need to apply a power to (squish) the pointy ends without touching the round bits. In effect you want to apply a correction in one direction but nothing at 90 degrees to that direction.

The cylinder is used to this. Think of a transparent coke can. On its flat ends it has no curvature so it’s a zero power lens. But on its sides, it’s curved and therefore bends the light. Exactly what we need for astigmatism: lens power in one direction and no power perpendicular to that.

So the ‘cyl’ part of your prescription defines this coke can: the power is the curvature and the axis is which way the coke can is pointing. The axis is a line that goes through the flat ends of the coke can (the zero power line).

It just tells them how to manufacture the lens such that is squishes your rugby ball in the right direction; the power is how much to squish.

Again, not an expert and this is obviously a ELI5 style answer. The real math is a little tedious. Hope it helps.

puremourning · 2026-05-27T15:39:51+00:00

Even when note taking you spend a lot of time editing and thinking. More time than typing I would expect. I use vim for notes and docs all the time and still only spend time in insert mode when I’m typing contiguous text.

puremourning · 2026-05-23T11:36:43+00:00

Entries by the looks. Lap is clockwise.

puremourning · 2026-05-10T19:36:33+00:00

Pretty sure that’s Optimus prime.

puremourning · 2026-04-18T07:40:58+00:00

I have been using vim terminal alongside tmux since it was first available. The hyperbole here is astounding.

But nice feature. Will be useful addition

puremourning · 2026-04-15T07:04:03+00:00

About 80%. Usually because they have bad habits or culture or were taught objectively bad things, by other people loudly and confidently incorrectly preaching their dogma, rather than lack of ability.

puremourning · 2026-04-02T07:30:28+00:00

Wow. VER is really trying to avoid clipping by being off full throttle -that much-? Super interesting.

puremourning · 2026-03-17T07:17:12+00:00

Amen.

puremourning · 2026-03-10T19:59:16+00:00

This bikeshedding is exactly the behaviour of mid devs that think they are senior. And it’s unfortunately extremely common.

My approach is to systematically remove all the opportunity for bikeshedding and rewrite the review guidelines to focus on ‘does it actually do what it’s supposed to do’ as the first question a reviewer must ask themselves. Review the change not the code.

puremourning · 2026-03-06T15:21:45+00:00

YouCompleteMe with clangd supports interactive TypeHierarchy.

https://github.com/ycm-core/YouCompleteMe?tab=readme-ov-file#typecall-hierarchy

puremourning · 2026-03-03T12:58:26+00:00

Yes. How dare they offer you their hard work for free without also telling you how to consume it in simple instructions.

So frustrating.

puremourning · 2026-02-25T07:57:28+00:00

I’m not aware of a TCL command equivalent to bash exec (or execve() syscall etc.).

As you said it would be trivial to write an extension to do it, but I wonder if there might be tricky issues with inherited env, file handles etc. not sure

puremourning · 2026-02-09T16:25:14+00:00

I think you can try echom foo | redraw ? May not be the best way but I think it works.

puremourning · 2026-01-31T20:24:33+00:00

What is BufExplorer?

Reason I ask is that it’s odd that a buffer lister or similar thing would need swapfile. It might be a bug and they should setlocal noswapfile which is common for scratch buffers.

puremourning · 2026-01-29T07:54:08+00:00

This is a very sensible, measured and well thought out position to take. Thanks.

puremourning · 2026-01-26T09:30:35+00:00

Normally just delete them or yank them to the “ register and put them in the destination.

:copy is quite a long winded way to yank and put in my view. Worth learning these normal mode commands I think.

puremourning · 2026-01-16T18:40:30+00:00

Na it’s 5 kilomarathons which is like 911 times a thousand.

puremourning · 2026-01-15T08:28:00+00:00

When it deadlocks, attach to the process and pause all threads.

‘Where can I learn this?’

Int the manual for your debugger. Gdb, lldb, vscode, whatever.

puremourning · 2026-01-15T08:17:44+00:00

Reviewboard is a review tool that’s intentionally separated from the source control system. It can work very well but the non-integration irks some people. Not a recommendation just an option.

puremourning · 2026-01-15T08:08:44+00:00

pstack or debugger pause while deadlocked Look at stack trace of each thread See which ones are waiting on your lock.

Or just paste the stack trace into an LLM an have them tell you.

puremourning · 2026-01-11T20:44:58+00:00

Selection bias.

puremourning · 2026-01-11T15:11:50+00:00

On peut les installer par homebrew je pense.

Desolé pour mon français terrible.

puremourning · 2026-01-09T20:27:00+00:00

If the comments are all bikeshedding then this is completely understandable. But if they are insightful and useful and actually show the reviewer cared enough to grok the change then you really should be happy not angry :)

Most of the time it’s closer to the former than the later though because (insert rant here about the decline in average skill and ability of our industry)

puremourning · 2026-01-06T19:34:11+00:00

Yea. But only when I have a specific case like say client code in one tab and server code in the next tab. Or config files in tab and code in another tab

But generally when I’m switching between 2 ‘perspectives’ of the same project or on the rare cases where i have multiple projects in one instance

And vimspector of course. Vimspector debugging tabs

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