It's recommended to replace your glasses or sunglasses every 1-2 years, depending on how often you wear them and how well you take care of them. If you notice scratches or damage to the lenses, it's important to replace them sooner to ensure optimal vision and eye protection.

Polarized sunglasses are designed to reduce glare from reflective surfaces such as water, snow, and metal. They work by using a special filter that blocks out light waves that are oriented in a particular direction. This helps reduce eye strain and improve visual clarity in bright sunlight.
 

The best way to choose glasses for your face shape is to consider the balance between the frame and your facial features. For example, round faces look best with angular frames, while square faces look best with rounder frames. It's also important to consider the size and fit of the glasses.

Wearing glasses can help improve vision, reduce eye strain, and prevent headaches caused by squinting. They can also protect the eyes from harmful UV rays and prevent eye fatigue caused by prolonged screen time.