Spec: Item Type: Fishing Glasses Material: ABS, Optical Lens Weight: Approx. 146g / 5.1oz Focusing Method: Individual Focus Magnification: 4X How to Use: 1. Use your left eye to observe distant targets and rotate the left diopter adjustment ring until the target appears clear. 2. Then use your right eye to look at the same target and rotate the right diopter adjustment ring until the target appears clear in your right eye as well. Before rotating, check if the diopter adjustment ring has reached its limit position. Avoid applying excessive force when rotating to avoid damaging the lenses. Package List: 1 x Glasses 1 x Lanyard 1 x Cleaning Cloth 1 x Storage Bag Notice: Please note that severe astigmatism with diopter exceeding ±7 may still result in unclear vision even after wearing glasses.