Brown lens sunglasses are eyewear that feature lenses tinted in a brown color. These sunglasses are popular for several reasons:

1. Visual Clarity: Brown lenses can enhance contrast and improve depth perception, making them ideal for various outdoor activities and driving.
2. Light Filtration: They are effective at filtering out blue light and reducing glare, which can be beneficial in bright conditions.
3. Versatile Style: Brown lenses are often seen as a versatile option that can complement a variety of frames and outfit styles.
4. Comfort: Many people find brown-tinted lenses more comfortable to wear in bright light, as they can help reduce eye strain.

And brown lenses provide excellent visual contrast and depth perception, and are ideally suited for bright, sunny environments. The red and warm hues in brown lenses also help filter out blue light. Brown lenses are ideal for bright outdoor activities like golfing, driving and sailing.