Features: 1.[Multi Adjustment Knobs] Optometry optician frame contains multiple knobs, which can be adjusted for interpupillary distance, nose pads, temples, etc. 2.[PD Adjustment Range] PD 48 80mm adjustment range for both eyes of the trial frame left and right PD24 40mm adjustment range minimum graduation value: 1mm. 3.[360 Rotation] The lens of the optical trial frame rotates 360 around the optical axes in frame, with professional design and more flexible use. 4.[Lightweight] Weight of the optometry frame is very light, the net weight of the product is about 75g 2.6oz, and it will not feel heavy when wearing. 5.[Multi Application] Optometry frame is widely used, suitable for visual inspection in optical shops, hospitals, ophthalmology, schools, factories and mines, etc. Specification: Item Type: Optometry Frame Material: Alloy Frame Inner Diameter: Approx. 32.5mm 1.2in Color: Black Silver Pupil Distance (Abbreviated PD) Adjustment Range: Eye PD: Approx. 48-80mm 1.89-3.15in Left and Right PD: Approx. 24-40mm 0.94-1.57in Minimum Graduation Value: Approx. 1mm 0.04in Axial Indexing of the Dial: Left Indexing Disc: 120 0 135 Right Indexing Plate: 45 180 60 The degree of rotation of the lens around the optical axes in frame: 360 Adjustable Range of Nose Pads: Length: Approx. 0-14mm 0-0.55in Angle: 0 30 Left and Right Frame Leg Length Adjustment Range: Approx. 98-135mm 3.86-5.31in (Data May Have A Little Error) Package List: 1 x Optometry Frame?Versatile Application in Various Settings?The optical trial lens frame is widely used and suitable for visual inspections in optical shops, hospitals, ophthalmology practices, schools, factories, mines, and more. With its professional design and adjustable features, this frame is a versatile tool for conducting accurate and reliable eye examinations across different environments. ?Wide Adjustment Range for Both Eyes?With a PD adjustment range of 48 to 80mm for both eyes and 24 to 40mm for left and right sides, this trial frame offers versatility and precision. The minimum graduation value of 1mm ensures fine-tuned adjustments for accurate testing and evaluation. Experience superior control and accuracy with this professional optical trial frame. ?Lightweight Design for Comfortable Wear?Weighing only about 75g (2.6oz), this optometry frame is exceptionally light, ensuring a comfortable wearing experience without feeling heavy or cumbersome. Enjoy long hours of use without discomfort, making it ideal for extended visual inspections in optical shops, hospitals, and other settings. ?360 Rotating Lens for Enhanced Flexibility?The lens of this optical trial frame rotates 360 around the optical axes within the frame, providing professional design and exceptional flexibility in use. Easily adjust the lens position for optimal visibility and testing conditions, ensuring accurate results and efficient examinations. ?Customizable Fit with Adjustable Knobs?This optical trial lens frame features multiple knobs that allow for precise adjustments such as interpupillary distance, nose pads, and temples. Enjoy a customizable fit tailored to your specific needs for optimal comfort and accuracy during visual inspections.