Pediatric Aphakia
Aphakic Contact Lens Power Calculator
Estimate contact lens power for aphakic children using the Trivedi–Wilson regression formula or the Aphakic Contact Lens formula.
Trivedi–Wilson Regression Formula
CL = 84.4 − (3.2 × AL)
mm
Contact Lens Power
—D
Reference
Trivedi RH, Wilson EM. Selection of an initial contact lens power for infantile cataract surgery without primary intraocular lens implantation. Ophthalmology. 2013;120(10):1973–6.
Aphakic Contact Lens Formula
CL = (1334/AL) − (0.6685 x K) − 15.25 + TR
mm
D
D
Contact Lens Power
—D
Reference
Lwowski C, et al. Correction of aphakia using biometry-based contact lens calculation in pediatric cataract extraction: introducing the aphakic contact lens formula. Graefe’s Archive for Clinical and Experimental Ophthalmology. 2026. doi.org/10.1007/s00417-026-07370-6