Adjustable Pupil Distance: With a professionally designed frame, Ophthalmic Flipper allows easy adjustment of interpupillary distance. Clear measurement markings simplify usage, making it a convenient choice for vision assessments. Durable ABS Construction: Crafted from ABS material, pin hole glasses for vision improvement are safe, ecofriendly, and built to last. Its sturdy construction ensures stability and longterm wear. Ergonomic Grip: Designed for ease of use, pinhole glasses for vision improvement are equipped with grooves on both sides of the handle, ensuring a secure grip during operation. This enhances usability and makes it an essential eye care tool. Effective Vision Training: The Optical Instruments is ideal for vision improvement exercises when used alongside vision cards and lenses (not included). Over a typical period of 15 days, users may see significant improvements in their vision. Use Scenarios: In clinics or assessment settings to adjust IPD and conduct quick vision checks with a stable, easytohandle frame. At home or in training environments to perform vision exercises with vision cards and lenses (not included) over a twoweek program. In schools, workplaces, or while traveling to support portable eye care, quick screenings, and regular vision training.