The optician has written to me. He hasn't seen for two years so thinks it's time we got together again. I think he could be right: I've been getting headachy after writing on the computer a lot.
I have three pairs of glasses: upstairs, downstairs, and outside.
I use the upstairs glasses for reading. They're two years old and were supposed to replace my downstairs glasses but I can't use them on the computer.
The downstairs glasses I use for computer work. They're four years old.
My outside glasses are also two years old but I've only recently started wearing them for driving, when I remember. And also for watching television sometimes.
Is it any wonder I get confused?