Start with fit and protection. Ensure 100% UV protection and a frame that sits comfortably on your face; pick a square shape you feel confident wearing daily.

UV protection (UV400), lens type (polarized or not), frame size and bridge fit, and frame material for durability.

Consider the intended use (everyday wear, driving, outdoor activities), whether you prefer eco-friendly materials, and features like clip-on lenses or color/style preferences.

Look for Asian-fit or smaller bridge sizes for a comfortable nose and temples; for convenience, clip-on sunglasses let you wear them over prescription frames when needed.