Femtosecond Laser in Comparison to Moria Microkeratome in Creating Corneal Flaps Clinical Trial
Official title:
Predictability of Corneal Flap Thickness in Lasik Using Femtosecod Laser in Comparison to Moria Microkeratome
Since the cornea is the main responsible for the refraction of the eye, as its refractive power is greater than 70% of the total refraction of the eye, so modification of its refractive properties are used to change the optical system of the eye. Hence, laser-assisted in situ keratomileusis has become the most commonly procedure used to correct the refractive errors of the eye. The most important step in laser-assisted in situ keratomileusis is the creation of the corneal flap, which its thickness may judge the whole outcome of the surgery . So trying to minimize the variation in the thickness of the resultant flap in comparison to what planned flap thickness preoperatively become our target.
As laser-assisted in situ keratomileusis procedure started to use automated microkeratomes in
creating corneal flaps since 1989, and science go on until United states Food and Drug
Administration approved the IntraLase laser for flap creation in January 2000 femtosecond
lasers work by emitting light pulses of short duration (10−15 s) at 1053 nm wavelength that
cause photodisruption of the tissue with minimum collateral damage . This enables no blade
incisions to be performed within the tissue at various patterns and depth with high
precision.
Aim of the work To evaluate and compare the variation in corneal flap thickness created from
use of a femtosecond laser and a MORIA microkeratome when making a 110-µm- and 90- µm thick
corneal flap and to identify the potential factors that affect corneal flap thickness.
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