What is IOL Master700 TK ?

[ Note : The current Barrett Toric Calculator uses a unique eye model to predict the posterior corneal surface. Using Total Keratometry with the Barrett Toric Calculator would thus lead to overcompensation of posterior corneal astigmatism.

Therefore, Graham Barrett has developed three True K series of formulae: the Barrett TK Universal II for non-toric IOLs, Barrett True K with TK for post-LVC eyes and the Barrett TK Toric for toric IOLs. All three new formulas use posterior corneal surface measurements of the ZEISS IOL Master 700 instead of the eye model used by the Barrett Toric Calculator. ]