Advantages of YOCTOSUN Headband Magnifier Glasses This YOCTOSUN Magnifying glasses with 3 led lights, 5 detachable lenses, wholly rubber wrapped nose bridge and newly designed spectacle frame is much more comfortable for seniors, hobbyists and professionals to wear. No Eyestrain - Unlike regular reading glasses or magnifiers, YOCTOSUN Magnifier is distortion-free and very easy to use for extended periods of time.Distortion-Free - Optical Grade 5H Acrylic Resin Lenses Provided Clear View of Objects.Lightweight - Newly-designed eyeglass frame and wholly rubber wrapped nose bridge can greatly lighten the load on the bridge of your nose.Adjustable- Adjustable LED Light Angle ,adjustable nose pad and adjustable frame.Power indicator light design helps you to charge the battery timely. Five Zoom Levels Magnifying Headset YOCTOSUN headset magnifier comes with 5 magnification lenses 0.75x,1.25x, 2x, 3x, 4x.A 0.75x magnification power is a 75% increase in the magnified object's size. A 1.25x magnification power is a 125% increase in the magnified object's size. Recommended for hobbies and close-up work: Diamond PaintingPaint by NumbersCross StitchNeedleworkJigsaw PuzzlesCross StitchSewing High Quality Lenses and Three Rechargeable LED Lights The lenses are made of acrylic resin, the surface hardness of the lenses reaches 5H grade, which is more wear-resistant and durable. The wider lenses provide you with wider field of view. Three led lights with two levels of brightness are available by tapping the power button on the side. High and low setting provides excellent light for illuminating detailed surface. Comfortable and Easy to Use Magnifying Glasses Ergonomic glasses frame with nose bracket, very light weight and comfortable to wear and will not feel fatigue after long time wearing.The nose pad is flexible so you can form it to fit just right and spread pressure evenly.The sturdy frames feature a "slack wheel" that enables you to adjust the frame to your most comfortable fit.Rubber Head Strap can effectively prevent falling, it can make the glasses fit even more snug. Some tips on using this magnifying glasses 1. When using different lenses, please refer to the focal length of the 5 lenses below. 26-1/4" (0.75 X lens)15-3/4" (1.25 X lens)9-7/8" (2.0 X lens)6-1/2" (3.0 X lens)5" (4.0 X lens) The above focal Length is for normal vision, not applicable for myopia,hyperopia and astigmatism. For myopia,hyperopia and astigmatism the focal length may change. 2. The higher the magnification of the lens, the closer it is to the object. 3. If the magnifier glasses does not stay in place, please remember to attach the rubber head strap to the arms of the glasses to keep it in place. 4. Not recommended to wear frame glasses with the magnifying glasses. Magnifying Glasses with Light for Close Work Why the images appear blurry when wearing our magnifying glasses and how to prevent blurry images？ Inappropriate magnification: It is important to choose the magnification lens that suits your work. If the magnification is too high or too low, you may find it difficult to see clearly. High magnification can reduce the field of view, while low magnification may not provide the desired magnification effect.Incorrect focal distance: Our head-mounted magnifiers have a fixed focal distance, so customers must use the magnifier at the correct distance. If the distance between the customer's eyes and the magnifier lens, or between the magnifier lens and the object, does not match the designed focal distance, the image may appear blurry.Not wearing corrective glasses: If the customer has nearsightedness, farsightedness, or astigmatism and does not wear corrective glasses, their vision problems will still affect clarity when using the magnifier. The magnifier does not correct these issues but only enlarges the image.Unfamiliar with the device: Some users may not be familiar with how to adjust the focus and angle when they first start using the head-mounted magnifier. At first, they may find the image blurry, but over time, they may gradually get used to it and find the optimal way to use the device.Dirty or scratched lenses: If the lens is dirty, smudged, or scratched, it can cause blurry vision. It is recommended to clean the lens regularly to ensure the surface is clear and unobstructed.Insufficient lighting: Good lighting is essential for clear observation. If the lighting in the environment is insufficient, then customers may find the image blurry. Ensuring enough lighting while using the magnifier can help improve clarity.