I got my eye exam and my vision has changed. I wear contacts and the measurements on the boxes say -7.00 for my right eye and -6.50 for my left eye. Honestly is this really bad? Im really sad right now because about two years ago (im guestimating) my prescription was -5.75. Is this a significant change for two years? What’s my eyesight measurement like in comparison with the average eyeglass wearer’s prescription?