RESUMEN
Background: LASIK is the most popular surgery to correct the refractive errors nowadays. It is proved to be safe, effective and well predictable. It is important to produce a uniform flap with a narrow SD from the intended thickness. The Integrated optical pachymetry is a convenient and useful feature of the EX500 excimer laser which can be used to measure flap thickness intraoperatively
Objectives: this study aimed to detect the accuracy of Allegretto Wave light FS200[TM] platform in creation of different corneal flap thicknesses
Patients and Methods: sixty eyes of 30 myopic patients were included in our study, the patients were operated by 2 different surgeons from June 2017 till December 2017. The patients were distributed randomly into 3 studied groups. Group I [20 eyes with intended fs flap 100um], group II [20 eyes with intended fs flap 110um] and group III [20 eyes with intended fs flap 120um]. All participants were subjected to full medical history taking, uncorrected distance visual acuity, slit-lamp microscopy, corneal topography using oculus[registered] pentacam device, manifest and cycloplegic refraction, corrected distance visual acuity, fundus bio-microscopy examination using 90 D lens
Results: in this study 100 micro m thickness group [Group A] showed the lowest difference between the mean result and the intended flap [-0.35um] followed by the 120 micro m group [Group C] with difference of [-2.9um] between the mean result and the intended flap thickness followed by the 110 micro m group [group B] with the highest difference [-3.45um] from the intended flap thickness
Conclusion: the flaps made with the Wavelight FS200 femtosecond laser were predictable and uniform more predictable in group A than in group C and B, but with no statistical significance between the three studied groups [P=0.402]