This may take some experimentation on your part. Try some of the following:
1. Change your auction chat window background to white
2. Change the colors of item links (not sure if you can do this, but should be in the same section as the other chat colors)
3. Rather than watch live auctions, turn it off and use this page instead:
http://ahungry.com/eqauctions - should be pretty up to date and you can send tells to anyone you want to purchase from. For selling, just add PST to the ends of your WTS postings. It's normal to send tells anyway but PST is more explicit.
4. Take frequent breaks from reading auctions, say every 10 minutes if you start developing headaches at 15 minutes
5. Resize your auction chat window so things don't scroll out of view so fast