Optical Trail Lens Frame Glasses Titanium Alloy Universal Adjustable Accessories Optometry Ophthalmologist Test Frame

Features 1 Ultra light titanium optometry frame for comfortable wear 2 Adjustable range of PD About 25 40mm 0 98 1 57inch 3 Up to 4 lenses can be inserted on each side 4 Adjustable temple length tilt angle it can meet your different needs 5 Applications This product is suitable for eyewear inspection in optical shops hospital ophthalmology schools factories and mines etc Specification 1 The distance adjustment range the distance between the eyes is about 48 80mm 1 89 3 15inch the left or right distance is about 24 40mm 0 94 1 57inch the minimum scale value is 1mm 0 04inch 2 Axis scale of the index plate left indexing plate 120 0 135 right indexing plate 45 180 60 axis scale increases counterclockwise along the frame axis the interval is 5 3 The inner diameter of the frame 32 5mm 4 The number of lenses that can be inserted into the left or right frame at the same time 4 pieces 5 The degree of rotation of the lens around the optical axis in the frame 360 6 The non parallelism of the optical axis of the lens and the geometric axis of the frame 2 5 7 The difference between the optical center of the lens and the geometric center of the frame 0 5mm 8 The displacement of the lens relative to the geometric center position of the frame 0 3mm 9 Nose support adjustment range length 0 14mm 0 0 55inch angle 0 30 10 Left or right temple length adjustment range about 98mm 135mm 3 86 5 31inch 11 The maximum sp