What about if we do not know the pre-laser K readings?. Should I still use double-K?. The answer is YES. How to do it…, there are two ways: 1- Use an standard K reading. In 5980 eyes seeking for refractive surgery in Clinica Baviera (Spain), the average K reading was 43,60. Other studies have reported slightly steeper K readings (Khabazkhoob M, Hashemi H, Yazdani K, Mehravaran S, Yekta A, Fotouhi A. Keratometry measurements, corneal...

DO I HAVE TO USE DOUBLE-K METHOD WHEN CALCULATING IOL POWER AFTER LASER REFRACTIVE SURGERY?. Double K method was describe by Dr Jaime Aramberri in 2003 (Intraocular lens power calculation after corneal refractive surgery: Double-K method. J Cataract Refract Surgery 2003, 29(11):2063-2068). The rationale for using double-K method is because most calculating formulae use keratometric power twice in their algorithms: First to calculate the power...

  This is the defocus curve of a patient with a trifocal lens implanted one year ago. The result is excellent, however, the patient is unhappy…, the vision is not sharp. Could it be due to a decrease in contrast sensitivity?. It could be possible but not in this case. See the contrast sensitivity curve… So, what it is?…, how can we detect people who will not do well with a multifocal intraocular lens?. This is the key to...

We many times wonder when planning a treatment if it is worthy to apply a personalized treatment to a patient. Is it worthy?. Is it cost-effective?. Laser manufacturers persuade us to use this kind of treatments. Many times we do not know how much effect they have in vision and even if it is true what they tell us they do. When using the platform Technolas Z 100P, we have the possibility of using the so called “aspheric treatment”....