Local Steepening in Peripheral Corneal Curvature After Corneal Refractive Therapy and LASIK

Abstract

Both, surgical and non-surgical interventions show a mid-peripheral local corneal steepening. However, the narrower optic zone and higher midperipheral steepening with CRT seems to provide the potential to create a more relative peripheralmyopic increase in corneal power than LASIK, which may have implications in slowing down myopia progression.

Visual outcomes and corneal changes after intrastromal femtosecond laser correction of presbyopia

“…Steepening in the corneal curvature after LASIK and refractive therapy with gas-permeable contact lenses has been reported. 28,29 However, corneal manipulation can be associated with a risk for keratectasia. Several cases of corneal ectasia have been reported after LASIK and photorefractive keratectomy.…”

Recovery Evaluation of Induced Changes in Higher Order Aberrations From the Anterior Surface of the Cornea for Different Pupil Sizes After Cessation of Corneal Refractive Therapy

“…This is explained by the change in the corneal curvature at the margins of the optical zone created. 29 Hence, we consider it important to study the aberration values for the different pupil diameters. To the best of our knowledge, the current study is the first to evaluate the recovery of the different corneal HOAs for 3-, 4-, 5-, 6-, and 7-mm-diameter pupils, after treatment with CRT for 1 year.…”

Visual Quality Differences Between Orthokeratology and LASIK to Compensate Low–Moderate Myopia

“…Differences in HOAs induced by LASIK and ortho-k have been explained by the change in corneal curvature at the margins of the optical zone created. 29 Queirós et al 29 reported that the transition zone between central treated and peripheral untreated cornea is smoother in LASIK compared with ortho-k. This difference provides a higher change in corneal asphericity in ortho-k compared with LASIK.…”