Key factors are UV protection (UV400), lens quality and polarization, the lens tint and contrast, and how the frame fits your face for comfort all day.

Purple tints can influence color balance and glare; try them in the settings where you’ll use them most to see if you like the effect on contrast and color perception.

Protection, lens performance (polarization if desired), fit and durability, comfort, and price/brand value.

Polarized lenses reduce glare for driving, boating, and outdoor activities; if you frequently view screens or don’t need glare control, non-polarized is fine.

Driving benefits from glare reduction and good coverage; sports require durable frames and secure fit; casual wear prioritizes style and color coordination.

Look for frame width, temple length, and nose bridge details or adjustable features to ensure a comfortable fit for your face shape.