If you are having diffeculty in seeeing the things clealy then you should consult the doctor immidiately. If you have a number on the eyes or the doctor had adviced you to wear glasses then you should start wearing the glasses straight away.
Many people ignore doctor's advice and do no use glasses just because they think that i might not look good or they might look stupid or people will crack jokes on them or any such stupid reason. This might either do further damage to their eyesight or may lead to blindness.
Thus always use Glasses if you are adviced by the doctor to do so.