Comparison of laser in situ keratomileusis flaps created by 3 femtosecond lasers and a microkeratome

Abstract

Flap morphology differed according to the system used. The 3 femtosecond laser systems appeared to be superior to the microkeratome system generally. The 3 femtosecond laser systems also produced different flap configurations depending on their individual mechanisms.

Ocular Aberrations and Corneal Thickness-Intraocular Pressure Relationship One Year after Laser in situ Keratomileusis (LASIK) Enhancement with An Aspheric Ablation Profile

“…Compared with a femtosecond procedure, predicting the change in rigidity when the flap is created using a mechanical microkeratome is compounded by factors such as the variability in the flap thickness profile where the meniscus of the flap is much thicker in the periphery than in the center (especially with the rotatory microkeratomes as used in this investigation), variable hinge length, shallow angled side cut and decreased flap re-adherence to the underlying stromal bed. [48][49][50]. Our data on correlation between IOP and CCT shown in Figure 3 revealed no significant change in this correlation resulting from the refractive enhancement procedure.…”

Femtosecond Laser-Assisted Astigmatism Correction

“…In a recent study that evaluated the thickness and side-cut angle of LASIK flaps using Fourier-domain optical coherence tomography (OCT), flap creation for bilateral LASIK was performed using an IntraLase, VisuMax, or Femto LDV femtosecond laser or a microkeratome. The study found that flap morphology differed according to the system used and the 3 femtosecond laser systems appeared to be superior to the microkeratome system (Ahn et al, 2011).…”

In vivoultrathin Descemet stripping automated endothelial keratoplasty with a low-energy and high-frequency femtosecond laser

“…The microkeratome coupled to the artificial chamber can produce an endothelial donor lamella (EDL); however, the cutting irregularities and the unpredictability of the depth of the cut are major impediments to the visual outcome of lamellar transplantation (3,4) . New models of femtosecond lasers (FS) produce a better corneal lamella quality than the microkeratome (5)(6)(7)(8)(9) . Lasers with a high frequen cy and low energy tend to make a corneal cut smoother, more homogeneous, accurate, and reproducible, as smaller intrastromal bubbles are produced, creating smaller cavities in the cornea (5)(6)(7)(8)(9) .…”

“…New models of femtosecond lasers (FS) produce a better corneal lamella quality than the microkeratome (5)(6)(7)(8)(9) . Lasers with a high frequen cy and low energy tend to make a corneal cut smoother, more homogeneous, accurate, and reproducible, as smaller intrastromal bubbles are produced, creating smaller cavities in the cornea (5)(6)(7)(8)(9) . Cell necrosis and inflammation in the cornea increase as the energy used by FS increases (5)(6)(7)(8)(9) .…”

“…Lasers with a high frequen cy and low energy tend to make a corneal cut smoother, more homogeneous, accurate, and reproducible, as smaller intrastromal bubbles are produced, creating smaller cavities in the cornea (5)(6)(7)(8)(9) . Cell necrosis and inflammation in the cornea increase as the energy used by FS increases (5)(6)(7)(8)(9) . There is a direct relationship between the frequency and amount of energy required to form a shooting corneal lamella.…”