Okay, so today I messed around with something called “eye cup to disc ratio.” Sounds fancy, right? Well, it’s actually related to eye health, and I wanted to see if I could figure out my own ratio, just for kicks.
First, I dug up some info online. Apparently, this ratio is a way to measure the size of your optic nerve “cup” compared to the whole optic disc. It can be an indicator of things like glaucoma, but I’m definitely no doctor, so this was purely for my own curiosity.
The “normal” range is supposed to be something like 0.3 or less. A bigger number might mean there’s a problem, but again, I’m not a doctor, so don’t take my word for it.
My DIY Attempt
I found a recent eye exam report. I have got my fundus photographs last year. Good start, right? Then I grab the photo and open it in a simple image editor, nothing fancy, just the basic one that comes with my computer.
- I zoomed in close, and I see the optic disc and that little “cup” in the middle. I guess it’s shaped a bit like a donut, with the cup being the hole.
- I started to draw two lines:
- One across the widest part of the entire optic disc (the whole donut).
- And other on the widest part of the cup (the donut hole).
- I divided the cup measurement by the disc measurement to get a simple ratio. It shows on the screen as 0.4!
I know, I know, this is super rough. I’m pretty sure a real eye doctor has way more precise tools and methods. But it was a fun little experiment to see how these things are measured, at least in a basic way. It is great and excited to have a try!