Please get your refraction done and start using specs as advised.
As you are a regular computer user so it might be computer vision syndrome please use lubricant eye drops e.g. teardrop 2to3 times daily and rub ocupol d's eye oint twice daily on lids
Next Steps
Follow 20.20.formula ie close your eyes for 20seconds after every 20minutes.keep proper distance between eyes and screen wash your eyes with freshwater frequently and don't sit facing towards a/c or blowers. consume lots of fresh fruit and vegetables.