Going back to work after decompression

I'm going back to work in two weeks...I work on a computer on a raised counter area...like a bank. I have a high stool to sit on but have to go up & down it all day long to get to another window for another service we offer.

My question is: other than lowering the screen...how can I keep from straining my neck. Both neurosurgeon & PT tell me to tuck my chin down...yet I can't focus eyes (left eye is still glitchy & has a tic in it) enough to see screen...any tricks to do this??? Need to practice before going back.

Any advice would be greatly appreciated.