Is a 68Hz refresh rate bad?

I have a 19" CRT monitor and the following resolutions are:

640x480 @ 148Hz.
800x600 132Hz.
1024x768 106Hz.
1280x1024 80Hz.
1600x1200 68Hz.
1792x1344 61Hz.

I know that 60Hz will strain your eyes, but I was wondering if 68Hz is acceptable? By the way, 1280x1024 is the native res.

i also have samsung CRT monitor but when i set at 60hz my screen becomes shaky in pakistan.

may be because of mobile rays or towers or voltage fluctuation. but i do have a stabilizer fixed.at computer.

Ok, maybe I should've reworded my question. I'm GOING to buy the monitor, so I don't have it here with me to try out.

^^^And don't worry, the 1280x1024 res is at 80hz, which is enough.

You're BUYING a CRT? Why?whgresiak