Abstract
Correlation between ocular axial length, anterior chamber depth, Average K-values and a differential analysis in short
Highlights
To study correlation between ocular axial length, Average K-values and anterior chamber depth in eyes and to differentially analyse strength of this correlation in eyes with short axial length
The evolution of intraocular lenses (IOL) formulae can be classified on the basis of their derivation as (a) theoretical formulae, (b) formulae based on regression analysis, and (c) a combination of both principles
The quest for further accuracy led to the application of fourth generation formulae that use additional biometric parameters: Haigis formula requires Anterior chamber depth (ACD) and effective lens position (ELP), Holladay 2 formula requires ACD, ELP as well as white-to-white distance, lens thickness, preoperative refraction, and patient’s age [5]
Summary
To study correlation between ocular axial length, Average K-values and anterior chamber depth in eyes and to differentially analyse strength of this correlation in eyes with short axial length. A comparative analysis using ultrasound Biometry and automated keratometry for pre-operative measurement of Axial length (AL), Average K-value, Anterior chamber depth (ACD) and calculated IOL power was done. Statistical Analysis was done to determine overall correlation between three parameters. Results: Comparison of axial length with various clinical parameters showed a p- value of 0.00, suggestive of highly significant statistical correlation of ACD between 2 sub-groups (Group A; 20.00 to 20.99mm and Group B; 21.00 to 22.00) and Correlation analysis between AXL, ACD and Average K showed p –value of 0.00 , suggestive of highly significant statistical correlation between AXL and ACD.
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