Sex and time of measurement significantly affect corneal backscatter measured by IVCM, whereas age affects only backscatter in the anterior stroma. All three factors should be taken into account when conducting scientific research. For ophthalmic practice, the authors suggest ignoring these factors and propose a generalized normal range and minimum detectable change for each backscatter variant.
Large interinstrument differences necessitate calibration of corneal backscatter measurements. With AMCO Clear suspension and PMMA slabs, standardization was achieved in a wide backscatter range corresponding to normal and opaque corneas. These methods can easily be applied in ophthalmic practice.
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