Cataract Diagnostics and Equipment Phacoemulsification at High IOP and Physiologic IOP; Impact on Anterior and Posterior Segment Physiology Sep 10, 2025 Matthew Rauen, MD Related Publications SS-OCT Biometers Using the SOS versus Mean Group Refractive Index to Measure Axial Length Cataract Diagnostics and Equipment Today’s SS-OCT Biometers employ two methods to measure the axial length: Sum-of Segments using individual refractive indices or a Mean Group Refractive Index Learn More ↑