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Dollger sunglasses are scratch resistant, but if you accidentally make your sunglasses scratched, the best solution is to have new lenses made or buy a new sunglasses. But if you insist to fix your sunglasses yourself you can use plastic polish, and get a soft cloth and rub the polish across the scratch in several directions.

To check if a pair of sunglasses is polarized, You need two pairs of sunglasses, hold one pair in front of your eyes and look through it. Then you hold another pair in front of the first pair, rotate it 90 degrees. If both pairs of sunglasses are polarized, vertical light will get blocked and will be completely dark. If one or both pairs of sunglasses are not polarized, you will still see something through them.

Rinse off the dirt and debris with lukewarm water, gently rub each lens with mild soap or lotion-free dishwashing liquid soap for at least 30 seconds to disinfect them. Then Rinse away the soap with lukewarm water again and carefully wipe the lenses dry with a clean cloth.

To tighten your Dollger sunglasses, you can check for loose screws first, most frames have screws at the temple corner (hinges) of the frames. Carefully tighten the screws at the temple corners by turning the screws counterclockwise using a screwdriver.

There's no right or wrong way to choose frames that suit your face shape, but Dollger has some tips for you.Measure your face and find your face shape.Choose sunglasses that complement your face shape.Round face: square frames. Square face: round frames. Oval face: any frames. Heart-shaped face: cat-eye frames.

Asian fit sunglasses are sunglasses that are designed to fit better on people who have certain facial features. Those sunglasses has thicker nose bridges and nose pads to prevent sliding. Shorter lenses to avoid touching the cheeks. Decreased frame curvature to match the face shape.

Polarized lenses are manufactured through a special process that reduces glare from reflected light. It helps you see better in situations where there are shiny or bright surfaces such as calm water, snow or glass. In addition to this, polarized lenses enhance visual contrast and color.

VLT refers to how much light passes through the sunglasses lenses to reach your eyes. The lower the VLT percentage, the darker the lens. Different VLT percentages are suitable for different environments and activities.