All contact lens wearers, especially those who have difficulty functioning without their contacts in, NEED to have a spare set of specs! Why? A number of reasons: There are times when a person can't wear contact lenses, whether for medical reasons, comfort, or convenience. Contact lens wearers also need eye protection, and contact lenses may not be suitable for your needs at all times.Backup. Everyone who has a vision prescription, should have a backup pair of glasses. See why here. Sunglasses. Contact lenses do not protect your eyes from the sun, or UV light. The same way you should wear sunscreen when you are in the sun, you should also have sunglasses to protect your eyes. See the risks of UV light here. Reading glasses. If you are over 40, you may have noticed that you aren't seeing as well up close anymore. Here we explain what presbyopia is, and why you will probably need some readers to wear with your contact lenses. Okay, so now you admit that you need a pair of glasses, whether it be a backup for your contact lenses, a pair of sunglasses, a set of readers, or all three.