I haven't the faintest idea what you are talking about.
I had an eye test once. Primary school. I was shitting myself, in case it turned out I was going to be a Speccy. Fortunately I passed* with flying colours.
*Though the oppswits never picked up I'm colour blind, useless tossers.
my school eye test at age 12:
Take your glasses off and read as much as you can on the chart.
Me - if i take my glasses off I can't see the chart
Just do as your told and stop being cheeky
Me (takes off glasses)- I can't see the chart
Just read what you can - you can read can't you?
Me - i can tell you what I can remember from before I took my glasses off or I can put them back on & try ?
Sigh, OK, what can you read with glasses?
Me (reads whole chart)
Have you been examined by an optician?
Me - (very quietly) where do you think I got the glasses?
Self preservation kicked in at this point and I left before it got any weirder