Sir you haven't mentioned whether it's a cylindrical or spherical power but it's a very less power glasses. If you are not having any troubles of eye pain or headache then you can use spectacles when the need is there like reading, using laptop/ computer/ mobile, watching Television and Movies in Theatres, Driving vehicles etc. Rest of times you can be Spectacles free if you want to. Focusing exercise without spectacles won't affect your eyesight. Follow a proper working pattern for gadgets/ screens, healthy nutritious diet, adequate sleep and adequate water intake all will help keep eyes in normal state.