First before the exercises, ensure that you eat lots of raw carrots. I am also short sighted and can testify to you that carrots have benefits. Some of those exercises include, setting a time limit like for how long you should wear the glasses. If you were used to wearing the glasses the whole day, reduce this to at least half s day and see whether you can make it without them. If you find it hard, then make it upto 10 hours daily. You should also make an effort to show that you want to get rid of glasses.
Also, you can at times try reading or walking without them at least for some hours and see whether you can manage.Keep on reading until you feel like you're straining a lot then stop reading. Keep on repeating this every day and with time, your eyes will get used to reading or walking without glasses.