PASCO Human Eye Model

Purpose: Use the included plastic lenses to create images for normal vision, far-sightedness, near-sightedness and astigmatism. Additional lenses are placed in front of the eye to correct for vision problems. Key Features: - Working Model of the Human Eye: Two lenses are used to form images on the retina, while the sealed tank holds water to simulate the vitreous humor - The size and orientation of the illuminated object is easily measured - Study the Optics of Normal Vision and Vision Correction: Use the included plastic lenses to create images for normal vision, far-sightedness, near-sightedness, and astigmatism - Additional lenses are placed in front of the eye to correct for vision problems - Fixed Corneal Lens and Interchangeable Crystalline Lens: The crystalline lens is surrounded by water (vitreous humor) - By changing the crystalline lens, the eye can focus on both near and far objects - Movable Retina: Three positions demonstrate near-sightedness, far-sightedness, and normal vision - Variable Pupil Size: Students can observe changes in both the brightness and clarity of the image as the pupil size is reduced What's Included: 1× Molded Plastic Eyeball 12× Plastic Lenses (2 sets of 6) 1× Pupil Aperture 1× Retina Screen 1× Optics Caliper 1× Adjustable Focal Length Lens with Syringe, Tubing, and 2 Flexible Lenses 1× Experiment Manual