eyesight

[Ju]

I know what is prebyopia and astigmatism.

Can I say :

1. My eyes are having prebyopia.
2. My eyes are having astigmatism.
3. My eyes are astigmatistic.

Any other suggestion?

Ju

[BobK]

It's unusual in colloquial Br English to specify. People say they're long-sighted, short-sighted,.... etc. If you've just had your eyes tested you might say 'He said I was slightly presbyopic' - the word in that context is obviously quoted from the language of an eye-expert. But if I went around saying 'I'm presbyopic' I'd sound very pompous.

b

[Barb_D]

You could say "My arms are getting too short to read."

[SoothingDave]

I would say "I have an astigmatism."

[Ju]

You could say "My arms are getting too short to read."

Is it an idiom?

[Barb_D]

No. But if you don't understand it, you're too young to suffer from it.