Anti-Reflective/Anti-Scratch Coatings are recommended if your eyes tend to get strained by glare (i.e. computer screens, headlights at night, bright-lit settings, etc.). Your eyes will thank you for adding this coating if this sounds like you. Not only does it help to increase comfort, the added layers help to protect your lenses from getting scratched and smudged easily. Think of this coating as the same type of protection as when you add a screen protector to the screen on your phone. It's there to ensure you're not damaging the material beneath the coatings. Lastly if this part's important to you, it is much more cosmetically appealing!