Recently, some investigators have expressed concern about the impaired integrity and decreased tensile strength of the cornea following radial keratotomy (RK) and wound healing, because of pathological findings in human and animal corneas. Corneal tensile strength in eyes following RK has been evaluated in animal models. It has been reported that rabbit corneas require 54% less energy for ruptu...

BACKGROUND To compare the outcomes of a toric phakic intraocular lens (PIOL) and a spherical PIOL combined with astigmatic keratotomy (AK) for the correction of high myopic astigmatism. METHODS This study enrolled patients with high myopic astigmatism, including 30 eyes (22 patients) that received a toric PIOL implantation (TICL group), and 32 eyes (24 patients) that received combined AK and ...

UNLABELLED Purpose. To describe a case of 3 refractive procedures performed in one eye over 2 decades. Methods. CASE REPORT Results. A 41-year-old patient presented for refractive surgery evaluation. His ocular history includes bilateral radial keratotomy performed 21 years ago for moderate myopia: spherical equivalence of -4.25 D bilaterally. Postoperative uncorrected visual acuity (UCVA) wa...

PURPOSE To record visual and refractive data in eyes with previous radial keratotomy (RK) and corneal instability undergoing corneal cross-linking (CXL). METHODS Case series of eyes with RK and refractive instability undergoing CXL with riboflavin and UV-A radiation. The following variables were recorded before 3 and 6 months after CXL: sphere, spherical equivalent (SE), uncorrected visual ac...

Sixteen patients enrolled in the PERK study were evaluated by fluorophotometry 24 hours or six months following radial keratotomy. A comparison of eyes operated and not operated upon showed that endothelial permeability was not significantly altered 24 hours and six months after surgery. Aqueous humour flow rates and anterior chamber elimination coefficients were significantly higher 24 hours a...

Excimer lasers and high technology instrumentation have ushered in a new era of vision improvement surgery in Hawaii, replacing the more traditional forms of refractive surgery: cataract surgery, corneal transplant surgery, and radial keratotomy. Corneal surgery has been enhanced by new techniques of microsurgery and a more effective tissue procurement system for donor corneal tissue. Several l...