Instruct: Classify the given Amazon review as either positive or negative.
Query: Why Didn't Someone Think of this Sooner?

If you're old enough to need reading glasses, you know what a pain it is to be outdoors with sunglasses when you need to see fine detail. Off would come the sunglasses and out would come the reading glasses -- back and forth all day. What a pain! These sunglasses have reading lenses built in. Whether I'm driving, fly fishing, hiking and trying to read a map or GPS, etc., these glasses both protect my eyes while making it a snap to read or see fine detail. Highly recommended. Once you try them you will never go back and wish that you had thought of this great idea.