Why is this the answer?

The answer is glasses because this clever riddle uses fun word pictures to describe an object that helps many people see the world better every day! Let us carefully look at the clues the riddle gives us to see exactly how it works. The first part says, "Without a bridle, or a saddle, across a thing I ride a-straddle." A bridle and a saddle are pieces of equipment that we use when we ride a real horse. The bridle goes over the horse's head to guide it, and the saddle is what you sit on. The riddle is already giving us a hint that the object being described is "ridden" or worn, but it does not need all that fancy gear. Think about something that rests on a part of your body. When something "rides a-straddle," it means it is sitting with one part on each side of something else, like a person sitting on a horse with their legs hanging down on both sides. Now, think about your glasses. The solid, middle part of the glasses frame sits right on the very top of your nose. The nose pads rest on the sides of your nose, holding the frame steady. It is the perfect way to describe how the glasses are sitting "a-straddle" on your nose, which is the "thing" the glasses are riding. It is a very playful and clever way to imagine something resting on your face! The second part of the riddle is the most helpful clue of all: "And those I ride, by help of me, though almost blind, are made to see." The people who wear the glasses are the ones they "ride." These people often need help with their vision. When the riddle says they are "almost blind," it means they have trouble seeing things that are far away or up close, or things are just blurry. The special lenses in the glasses are made just for those people, and they correct the vision problem. The glasses help make the blurry things look sharp and clear again, allowing the person to see everything, just like magic! This makes "glasses" the absolutely perfect answer to this wonderful riddle.