Features: Plastic Optometry Occluder ensures precise views testing with its wear resistant construction, ideal for frequent use in professional eye exams and DIY electrical projects. Lightweight plastic design seamlessly fit over eyewears frame, providing a comfortable and hygienic barrier during optical assessments. Trust by optometrists, DIY enthusiasts, and educators for reliable eye testing accuracy in clinics, workshops, or home base electrical engineering tasks. Optimized for views screening in clinical setting, school health programs, or personals DIY projects requiring controlled monocular occlusion. This reusable eye exam accessory as a practical tool for electrical hobbyists, combining accurate functionality , easy to clean materials. Specifications: Material: ABS Length:Approx.24.2cm/9.53'' Handle Shape:1,2,3 Package Includes: 1Piece Eye Occluder note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.