Decide if you need prescription lenses or sun protection, then compare frame style, size, and lens features like UV protection and coatings, plus overall comfort.

Key factors are frame fit and size for your face, lens type (prescription-ready or polarized), UV protection, and the price or warranty.

Consider your typical use (daily wear vs outdoor activities), color and material, and coatings like anti-reflective or blue-light protection to match your needs.

If you need both vision correction and sun protection, look for prescription sunglasses or frames that can be fitted with prescription lenses; for indoor use, Karlie I Glasses are typically the better fit.