Ergonomic Folding Microscope Eyecup

This 8 g rubber eyecup features a 32 mm outer diameter and 12 mm inner aperture, designed specifically for stereo microscopes, wide-field eyepieces, binoculars, and monoculars with 23–25 mm barrel sizes. Its soft rubber composition offers tactile feedback and gentle compression, while the integrated folding mechanism allows intuitive height tuning and minimal storage footprint. By promoting proper eye placement and shielding against ambient light and incidental contact, it enhances visual accuracy and user endurance during extended optical tasks — from classroom dissection to electronics inspection.