====== Estimating Contact Lens Power in Post-Operative Infant Aphakia ======

===== Based on Pre-Operative Axial Lengh =====

    * Contact lens power = 84.4 - (3.2 x Axial Length) 
      * Trivedi and Wilson.  Ophthalmology, 2013 October; 120(10): 1973-1976 [[http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4524546/ | Free full text]] 
    * Contact lens power = 70.4 - (2.5 x Axial length)
      * based on Infant Aphakia Treatment Study which excluded eyes with corneal diameter <9 mm. 
      * Trivedi et al. JAAPOS. 2014 June; 18(3):215-254 [[http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4080905/| Free full text]] 

===== Based on Age =====
  * Contact lens power = 30.25 - (0.3554 x age in months) 
    * Martin et. al. Arch Ophthalmol. 1983; 101:39-41 [[http://archopht.jamanetwork.com/article.aspx?articleid=634423|link]]

{{tag>cataract}}