Can eye strain cause nausea, vomiting, and loss of appetite?

No . It would be very unlikely. If you have nausea, vomiting lasting more than 24-48 hrs, call you physician for advice.
No. Although being sick can certainly give you the impression of your eyes being tired.

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Get a referal. You have symptoms which could be serious and should see your physician for a referal. He/she will listen to you, do a physical examinarion, run some tests, and let you know what's going on. Read more...

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