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  • Cataract Diagnostics and Equipment
SS-OCT Biometers Using The Sum-of-segments Method Versus Using The Mean Group Refractive Index To Measure Axial Length – How Does It Affect Iol Power Calculations?
Sep 08, 2022
SS-OCT biometers using the Sum- of-Segments method versus using the Mean Group Refractive Index to measure axial length – how does it affect IOL power calculations?

KEY TAKE-AWAYS

 

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

The differences in axial length measurement between the two methods are statistically significant and most noticeable in long and short eyes

Axial length determined with the Mean Group Refractive Index is slightly shorter in short eyes and longer in long eyes

Depending on the length of the eye, some newer IOL power calculation formulas may provide better outcomes with the Sum-of-Segment method

 
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