Re: Visit to the opticians.
Oh dear Nom, a couple more things to add to your problems.
I have had Blepharitis come and go, and I have a padded eye mask thingy (think I got it from Specsavers), and I microwave it for about half a minute and then relax with the warm mask over my eyes for about 5 mins.
Afterwards I bathe my eyelids with very warm water, put some drops in, and it feels very much better.
The other condition I have never heard of, so I googled it.
Sounds very strange and unpleasant.
Hope you can get it sorted soon Nom.