You're absolutely right, I took an eye test and my prescription was actually -9 and -9.25. I have been recommended to go for the NPPL or do a retest against 6/12 on each eye separately and 6/6 together. Unless you tell the optician they will correct you to 6/6 in each eye which would probably be 6/4 together. Apparently 6/12 is a couple of lines higher up the lettered chart and hence the letters are significantly bigger. On that basis I am trying a retest and I hope I can read them with less correction hence fall within the limits for a JAR PPL. I'll get a good night's sleep first too!
