get your eyes testing done again by an ophthalmologist having facilities of autoref. use lubricant eye drops  and close your eyes for 20 seconds after every 20 minutes.

Most of software professionals don't know how to work on computer for long time without giving trouble to eyes. While working on computer number of blinking drastically goes down from around 24 per minute to around 8 per minute leading to severe dryness causing burning, eyestrain, blurring of vision & headache. One should try to have normal blinking while working on computer, should look away from screen after every 10 minute , should take rest for 10 minute after every 2 hours& should wear antiglare glass. Software professionals should use lubricating eye drops 4-5 times daily (Systane ultra)&genteal gel once at bed time.

U need to consult an ophthalmologist for eye check up and refraction and accordingly power of specs will be given.meanwhile use refresh tear(any lubricanting) eye drop 5-6 times a day.