Thanks for all these additional information.
I understand your concern.
Well as you describe,such pulsation sensation in head can be associated with repetitive strain in neck due to prolonged hours of computer use.
Also refractive error in vision can be contribute to such sensation.
You should do gentle massage with muscle relaxant ointment and warm compresses on back of neck.
Also do gentle neck stretching and strengthening exercises.
You should take OTC Motrin.
You should take short breaks of rest while doing work.
You should hydrate yourself with plenty of fluids.
Your blood pressure should be monitored.
If your symptoms'll persist then eye examination should be done.
And you should see your doctor for further evaluation and management.
Let me know if you have any further query so we can discuss it thoroughly in every aspect.
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