I am 52 and have been monitored for high ocular pressure for about 15 years with appointments every 9 months or so. Pressure is usually around 22 or 23. It now appears that i have thick corneas , so they correct it to 16 and 17. I am on no treatment and a look on the internet seems that that I am less of a risk of glaucoma because of the thick cornea. I actually got a follow up letter last appointment and it says physiological disc cupping of .6. The anterior segment exam was unremarkable.
What is the disc cupping reading?