I use one on my bows, great for my older eyes. I can see my pins so much clearer now, If you use reading glasses or your pins are blurry you love one. Web site listed below. I believe I use the orange verifier compare with my reading glasses at 175 if that makes any sense to you.

http://www.lancasterarchery.com/adva...sort=3a&page=2

4080164 SPECIALTY HUNTER SUPER PEEP 1/4" CAMO 42° HOODED HOUSING

4080157 SPECIALTY HUNTER SUPER PEEP VERIFIERS