UK Keratoconus Self-Help and Support Association

Hello,
so on the forum i see 6/12 20/20 and variouse others. I do remember a while ago now a thread that explained what these did mean but i was non the wiser after reading it. So any help.

Which is better 6/12 or 20/20 and what exactly does it mean?

Hi

If I remember correctly 20/20 vision is when you can see at 20 feet, what someone with normal vision can see at 20 feet. This is the same as 6/6 but instead means 6 metres rather than the American 20 feet.

6/12 means: what you can see at 6 metres someone with normal vision can see the same thing at 12 metres.

The numbers change e.g. 6/18 but you can use the same principle. To amswer your question 20/20 or 6/6 vision is better than 6/12


Thanks

Thanks! I finally understand, no more wondering the lost sheep is found No thakns LOL

20/20 and 6/6 mean the same thing.

In the United States they measure sight against "normal" by comparing what you can see at distances measured in feet. Therefore somebody with 20/20 vision sees at 20 feet what a normally sighted person sees at 20 feet.

In the United Kingdom the same measurement is expressed in Meters. Thus 6/6 means you can see at 6 m what a normally sighted person sees at 6m. 6/9 means you can see at 6m what the normally sighted can see at 9m, 6/12 you see at 6 what the normally sighted see at 12 and so on up to 6/60. If your sight is less than 6/60 you are struggling!

I know the two conventions are confusing, but think yourself lucky you're not deaf: the various conventions for sign language make the rathr slight difficulties in understanding sight measurement a daudle.

Andrew

AS

You beat me to the draw. Welcome to the forum.

Andrew

Hehe i did post about this on the Snellen post earlier but i can't find it right now!

Just to add, the lines normally run as such from top to bottom:-

60
36
24
18
12
9
6
5

These can be different though with some charts so you will need to check rather than just counting lines!

Hope that helps, Sweet X x X

Sweet,

Egg and Bunny gone!

Did the bunny eat the egg and the dragon I emailed you eat the greedy bunny?

Hehe they do seem to disappear at times! I haven't played with the dragon yet but thanks for that it really is dam cute!!!

Sweet X x X

Hey AS

What you studying?

Andrew

Hehe now they are back!! LOL!! Just need to be patient they are around somewhere!!!

Sweet X x X