Effect of axial length and keratometry measurement error on intraocular lens implant power prediction formulas in pediatric patients.
OBJECTIVE
To examine the relationship between axial length and keratometry measurement errors and intraocular lens (IOL) power calculations for pediatric eyes.


METHODS
The sensitivity of IOL power calculation to errors in axial length and keratometry measurements was computed as a function of axial length and keratometry for the SRK II, Hoffer Q, Holladay I, SRK/T, and Haigis formulas.


RESULTS
The sensitivity of the IOL power calculation to an axial length measurement error is increased at 4 to 14 D/mm error in axial length in children compared with 3 to 4 D/mm error in axial length in adults. The error in calculation is 0.8 to 1.3 D/D error in keratometry measurement for both children and adults.


CONCLUSIONS
Axial length measurement errors in pediatric eyes may lead to large errors in IOL power calculations.
Eibschitz-Tsimhoni
Maya
M
Department of Ophthalmology and Visual Sciences, Kellogg Eye Center, University of Michigan, Ann Arbor, Michigan, USA. mayae@umich.edu
Tsimhoni
Omer
O
Archer
Steven M
SM
Del Monte
Monte A
MA
D000328:Adult; D002675:Child, Preschool; D003315:Cornea / Q000033:anatomy & histology*; D005123:Eye / Q000254:growth & development; D006801:Humans; D007223:Infant; D019654:Lens Implantation, Intraocular / Q000379:methods; D007910:Lenses, Intraocular; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D016896:Treatment Outcome