Cataract Diagnostics and Equipment Subjective Wearing Experience of the Total 30 for Astigmatism lens among satisfied Biofinity Toric lens wearers Jul 25, 2025 Jay Mashouf, OD 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 ↑