HGV medical and glaucoma!

Diagnosed with it in right eye only in mid 90s
Had operation in 2000 as all eye drops did not work
DVLA make me have special eye check every 3 years
Here is the weird thing … D4 medical at age 45 with special free eye check in 2003 which gave 2006 LGV expiry then eye only check in 2006 which gave 2009 LGV expiry then D4 medical at age 51 with special free eye check in 2009 which gave 2012 LGV expiry then eye only check in 2012 with LGV expiry in 2015 but then in 2013 my photo needed changing so I did that and got LGV expiry in 2018 !!!

I only have 01 eye code next to LGV categories but only need to wear glasses if left eye cannot see right mirror … EH !!