Specular microscopy can provide a non-invasive morphological analysis of your corneal endothelial cell layer. This is especially important for contact lens wearers. Normal aging causes these cells to gradually decrease over time. The endothelium of a ten year old, healthy cornea has approx 3,500 cells per square mm. By age 60, most people will have approx 2,500 cells per square mm. This test also screens for corneal diseases such as Fuch’s Dystrophy, keratoconus, and other corneal dystrophies.