Finite element analysis has been explored as a tool for estimating the refractive outcomes of corneal interventions such as laser in situ keratomileusis and photorefractive keratectomy [1]. Corneal astigmatism is a common geometrical abnormality that can be quantified topographically as the difference in curvature or dioptric refractive power of the steepest and flattest meridians, often represented as simulated keratometry values. Astigmatic keratotomy (AK) is an incisional method for correcting astigmatism by placement of paired, peripheral corneal arcuate incisions along the steep axis of astigmatism that act to flatten the steep axis. AK is a convenient method of astigmatism correction, but it is less predictable than other surgical options, has a limited range of effect, can induce higher-order corneal aberrations that reduce visual acuity, and can destabilize the cornea due to its dependence on disruption of collagen lamellar continuity [2].
Corneal collagen crosslinking (CXL) is an alternative...
