Dear Monica... I have gone through your post in which you have mentioned that you have Pricking sensation, pain & redness
in right eye since yesterday which aggravates on looking at computer screen for prolonged period of time & relieved on splashing cold
All these symptom indicate that you might be having Computer Vision Syndrome
So...to get relief, you should avoid looking continuously at the screen.
Give rest to your eyes for 2 min in every half hour, splash cold water.
Artificial tear solutions may also be used every 4th hourly.
Another reason of concern may be due to different refractive power in both the eyes.
So...if the symptoms still persist, it will be better to consult your Ophthalmologist.
Wishing you good health & a speedy recovery.
Thanks and Take care.