[Compatibility] - The trial frame is designed for use with 38mm outer diameter trial lenses. Its Φ32.5mm inner frame aperture offers an expanded field of view, enhancing the wearer's observation perspective.
[Material and Scale] - The trial frame is made from durable alloy, plastic and stainless steel materials. It offers excellent wear resistance. The scale lines on the frame are clear and accurately marked.
[Lens Slots] - The trial frame can accommodate up to 8 trial lenses, with 4 slots on each side. There are 3 slots in the front and 1 slot in the back. The stainless steel slots have even gaps and good elasticity, preventing the lenses from sliding. The trial lenses can rotate 360° within the frame, and their rotation can be easily controlled using a knob.
[Adjustable] - The trial frame allows for adjustments in PD (Binocular PD: 48-80mm, Monocular PD: 24-40mm), nose pad height (0-14mm) and angle (0°-30°), temple length (98-133mm) and angle, as well as astigmatism axis.
[User-Friendly Design] - The vision testing frame can be adjusted by adjusting the nose pad and temple arms, providing personalized adjustments for different wearers, ensuring a more stable and comfortable fit. Both temple arms can be opened outward at a certain angle to accommodate individuals with a wider facial width.
Double Convex Lens, 50mm Focal Length, 1.5" (38mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs
KWD 5
![13,500 Lines/inch Diffraction Grating Sheet - Double Axis [5 Feet x 6 Inch Roll]](https://cdn1.tilga.com/md/prod/1/1484/3/38687469.39829.jpg)
13,500 Lines/inch Diffraction Grating Sheet - Double Axis [5 Feet x 6 Inch Roll]
KWD 8.500
Double Convex Lens, 200mm Focal Length, 3" (75mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs
KWD 5.500
Fresnel Lens, 100x100mm, Focal Length 50mm, Acrylic Lens (not Glass), for Physics Classroom, Solar Heating, Fire Starter.
KWD 5.500
