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Lens Thickness

Lens Thickness

The lens thickness is not available by the IOLMaster. The LENSTAR is able to measure and report the lens thickness. The mean lens thickness measure in the 105 out of the 124 eyes was 4.53 mm (Range 2.74 - 5.41 mm, SD 0.479).

Lens Thickness Histogram as measured by LENSTAR

Discussion of Lens Thickness Results:

The lens thickness is a relatively new element introduced to IOL calculations.  Currently only the Holladay II and the Olsen formula employ the lens thickness in their methods of IOL calculation.  In order to better understand the impact of the lens thickness, I used my six sample eyes and I placed “No Info” or left the lens thickness blank in the Holladay II, and then I picked 2.50 mm (slightly smaller than the thinnest lens in the series) and 5.50 mm (slightly thicker than the thickest lens in the series).  The results are shown in the table below.

Lens Thickness Comparison


It is evident that having no lens thickness available vs. the worst case scenario potential, results in a predicted refractive error of at most 0.08 D for a 29.5 D lens.  How clinically significant is that in your estimation?


 

To continue with the study pages:

Axial Length

Keratometry

Anterior Chamber Depth (Previous Page)

Lens Thickness (Current Page)

White-To-White (Next Page)

Efficiency of the Instruments (and back to the main page)

 


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