4.0X Ergonomic Loupes Binocular Loupes Working Distance 450mm The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. hero-video Merchant Video Previous page Ultralight Comfortable Ultralight Comfortable Muli-layer anti-reflection coating provides extramely hight resolution. Optical Design Optical Design Lightweight durable,adjutable puil distance,no need to bow your head when working. Parallel Field of View Parallel Field of View 4.0X loupes field Of view:80mmThere is cord to fix frame on head to reduce press on nose. Long Depth Field Long Depth Field 3.0X loupes specification:Field Of View:95mm.Depth of field: 125mm Pupillary Distance Adjust Pupillary Distance Adjustment Lenses IPD can be adjusted synchronously by the knob. Next page 1 Ultralight Comfortable 2 Optical Design 3 Parallel Field of View 4 Long Depth Field 5 Pupillary Distance Adjust The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. hero-video Merchant Video Ergo Loupe 4.0X Working Distance 450mm Adjustable Bend Head Magnifying Glasses Lightweight: 51.2g MagnificationL 4X Working Distance: 450mm Field of View: 80mm Depth of Field: 70mm Light weight: 51.2gErgonomic magnifying glass with breakthrough capabilitiesBreaking the concept of tilt angle, dentists used to work with their heads down, even when wearing magnifying glasses, they still had to lower their heads down. While treating patients and helping them achieve health, these also harmed the health of doctors. For this purpose, we have specially developed this Ergo magnifying glass to reduce the pressure on the back, neck, and eyes of doctors during work, allowing them to work healthily, easily, and efficiently. When you take care of others, Ergo magnifying glasses help protect your bone health, making it easy and comfortable for you to work every day. Health tips: In both standing and sitting positions, the average weight of an adult's head ranges from 4.5 to 5.4 kg. When tilted, the neck load can reach 27kg, which may lead to premature disc wear.