The model is produced at a ratio of 1:6., Consist of three eye wall (outer, middle and inner) , refractive layers, lens and vitreum. The detail is incredible - it shows 12 different eye structures including the cornea, iris, lens, retina, optic nerve, and vitreous body, all clearly labeled... Consist of three eye wall (outer, middle and inner) , refractive layers, lens and vitreum. GRFIT 3X Enlarged Eyeball Cross-Section Anatomy Model Human PVC Eyeball For Anatomy Study Zoeyilan Eye Anatomy Model, Magnification 6X Eye Wall Layers Model 6X Magnification Human Eye Ball Anatomy Model Descriptions:The product is an anatomical model of the human eye, which is suitable for classroom teaching equipment. It has three eye wall (outer, middle and inner) , refractive layers, lens and vitreum 680g Package Includes: 1 x Eyeball Model The cornea, iris, lens and vitreous body can be removed.