Honestly, they are just really annoying. The entire point of them is lost on blind people. Een though the text to speech ...

This emoji is an icon of a picture of a heart ... When to use: When you’re talking about a medical condition or if you want to be extra vulnerable and truly “bare your heart” to someone.

An emoji may not be worth a thousand words, but they can certainly summarize a few pretty effectively. One of the most commonly used is the heart emoji, which comes in a rainbow of colors.