Calculation of Unknown Preoperative K Readings in Postrefractive Surgery Patients

Table 2

Comparison between the two methods to calculate the preoperative keratometry readings with the knowledge of the effective treatment.

Range	Effective treatment calculated at the corneal plane		Rosa et al. 2004
	n	%	n	%
±0.5 D	65	38.7	94	56
±1 D	146	86.9	150	89.3
±2 D	160	95.2	165	98.2
>±2 D	8	4.8	3	1.8

n = number of eyes; % = percentage of eyes; D = diopters.