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How do I check if my CRT lost its focus?

Hi everyone
My CRT is over 7 yrs old yet works fine. I read that CRTs can lose focus with time, causing eyestrain.

How can I check whether my CRT lost focus?

This is the monitor I'm using

http://www.ciao.co.uk/CTX_Professional_PureFlat_PR705F__5394452

I do sometimes get eyestrain, but I'm in front of my computer for over 8 hrs a day, so I'm not sure if it's the monitor or just the amount of time I view it. (please don't advise me to go with an LCD – I find them either way too bright for my sensitive eyes, or not clear. I work with text and need sharp letters)

Thank you

Callandor

The CRT loses focus when it starts to "bloom" every now and then, or if the whole picture disappears and reappears with regularity. 7 years is a long time for a CRT, so I would be grateful if I had one that lasted that long.

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nobus

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shlomofu99

ASKER

Thanks for the reply.

What do you mean by "bloom"? You wrote, "or if the whole picture disappears and reappears with regularity. " Are you giving an explanation of what you mean by 'bloom', or are you adding an additional thing to watch out for?

Also, this dissappear-reappear thing sounds similar to what I see when I do a deguass. Is it the same?

Thanks

shlomofu99

ASKER

nobus:

Thanks

I found the test I wanted within the websites you sent me to. It is here
http://www.passmark.com/products/monitortest.htm

The one from cnet is better but costs $500!

Thanks for your help

nobus

you're welcome !