Hi, I would like to ask a question but first my presriptions etc.

My prescription  in June 2004 was:

R:  +6.50 -0.50 X 112 (06+)                  Add +2.00         N5
L   +5.00                   (03-)                   Add +2.00
N5

At the end of February 2005 it was:

R:  +6.50 -0.50 X 112 (04+) ph (04-)      Add +2.00         N6
L:  +5.00                   (02)   ph (02-)      Add +2.00         N6

In October 2007 it was:

       Sph/Cyl       Axis    D Prism      V/A      Add         N V/A
R:  +6.50/-0.75       95                       0.3-    +2.25
N8-
L:   -4.5/0.00                    1/2 up        0.2-    +2.25
N10

I have ocular macular degeneration and corneal erosion and I am told
this is caused by inactive Best's Disease.

I would like to ask:
if the changes are considered slow/fast/usual?
If the changes are big or small?
how an 'inactive' disease could cause macular degeneration and corneal
erosion?
whether any of the prescriptions met the requirements for driving?
whether it is thought that Guillian Barre Syndrome ( contracted it 14
years ago, after which I was was unable to wear contact lenses again
and needed correction in my lenses for prism.
Finally(!) whether the latest prescription is indicative of
eligibility for registration as partially sighted?

To anyone with the knowledge and patience to answer any of the above -
thank you!

)