My 3 year old has been diagnosed as very long sighted and needs glasses. Neither myself or my husband wears glasses so this has caught us by surprise! We have two pairs of glasses on order but I need tips on how to introduce them, and do I need accessories? Like a strap/band? He’s very little - how in the world will they stay on? The optician says that everything must be very blurry for him right now, so I guess it’s good he has been diagnosed so early. TIA