This double concave lens is ideal for optical demonstrations, visual experimentation, and educational use in classrooms. Designed to make objects appear smaller, concave lenses are commonly used by farsighted individuals and in optical instruments like binoculars and telescopes. With a rubberized frame and convenient lanyard, it’s easy to handle and carry for hands-on learning or observation.

Product Features:

• 🔍 Double concave lens: Curved inward on both sides to make objects appear smaller and expand your field of view

• 📏 Lens diameter: 2-3/4 inches; 3-1/4 inches including rubber frame (frame color may vary)

• 🏫 Educational use: Excellent for teaching optics, physics, and visual perception in classrooms

• 🖐️ Rubberized frame: Easy-grip indented area for thumb and finger control

• 📿 Includes 16" nylon lanyard: Wear it around your neck for convenience during demonstrations

• ⚖️ Lightweight design: Weighs only 4.9 ounces