Visual and Refractive Outcomes with a New Topography-integrated Wavefront-guided Lasik Procedure.

Purpose: To evaluate the clinical outcomes of laser in situ keratomileusis (LASIK) using a new approach for the calculation of the ablation profile based on wavefront vertexing from pupil plane to corneal.

Methods: One hundred eyes of 50 patients (age, 21-41 years) with low and moderate myopia were enrolled in this prospective case series. All of them underwent topography-integrated wavefront-guided (TI-WFG) LASIK using the STAR S4IR excimer laser platform (Johnson & Johnson Vision).

Outcome analysis of intracorneal ring segments for the treatment of keratoconus based on visual, refractive, and aberrometric impairment.

Purpose: To analyze the outcomes of intracorneal ring segment (ICRS) implantation for the treatment of keratoconus based on preoperative visual impairment.

Design: Multicenter, retrospective, nonrandomized study.

Methods: A total of 611 eyes of 361 keratoconic patients were evaluated.

Clinical characterization of corneal ectasia after myopic laser in situ keratomileusis based on anterior corneal aberrations and internal astigmatism.

Purpose: To evaluate and characterize the clinical features of corneal ectasia after myopic laser in situ keratomileusis (LASIK) considering internal astigmatism and corneal aberrations and their correlation with other clinical data.

Setting: Vissum-Instituto de Oftalmológico de Alicante, Alicante, Spain.

Design: Retrospective comparative case series.

Keratoconus-integrated characterization considering anterior corneal aberrations, internal astigmatism, and corneal biomechanics.

Purpose: To evaluate the clinical features of keratoconus taking into consideration anterior corneal aberrations, internal astigmatism, and corneal biomechanical properties and to define a new grading system based on visual limitation.

Setting: Vissum Corporation, Alicante, Spain.

Design: Retrospective case series.

Femtosecond laser-assisted superficial lamellar keratectomy for the treatment of superficial corneal leukomas.

Purpose: To determine if superficial lamellar corneal excision with femtosecond laser followed by phototherapeutic keratectomy (PTK) using a masking substance improves visual acuity and optical quality of patients with severe corneal opacities.

Methods: Twelve eyes with corneal haze or scarring underwent confocal microscopy to estimate the opacities' thickness and calculate the excision depth. Femtosecond laser was then used to create a superficial corneal flap.

Modeling the intracorneal ring segment effect in keratoconus using refractive, keratometric, and corneal aberrometric data.

Purpose: To characterize the refractive, keratometric, and corneal aberrometric effect of a specific type of intracorneal ring segment (ICRS) as a function of its thickness and the preoperative conditions of the cornea.

Methods: A total of 72 consecutive keratoconic eyes of 57 patients ranging in age from 15 to 68 years were retrospectively analyzed and included in the study. All cases had a diagnosis of keratoconus and had undergone implantation of a 160° arc-length KeraRing segment (Mediphacos, Belo Horizonte, Brazil), by femtosecond laser technology.

Causes of intrastromal corneal ring segment explantation: clinicopathologic correlation analysis.

Purpose: To determine the main causes of intrastromal corneal ring segment (ICRS) explantation and the relationship with the microscopic findings on the ICRS surface.

Setting: Vissum Corporation-Instituto Oftalmológico de Alicante, Alicante, Spain.

Methods: This study evaluated ICRS that were explanted in centers in Spain from 2000 to 2008.

Refractive and aberrometric outcomes of intracorneal ring segments for keratoconus: mechanical versus femtosecond-assisted procedures.

Objective: To compare visual, refractive, and corneal aberrometric outcomes in keratoconic eyes implanted with intracorneal ring segments (ICRS) implantation using either a mechanical or a femtosecond laser-assisted procedure.

Design: Retrospective, consecutive case series.

Participants: A total of 146 consecutive eyes of 106 patients with the diagnosis of keratoconus (68 unilateral and 39 bilateral) were included.

Intracorneal ring segment implantation in corneas with post-laser in situ keratomileusis keratectasia.

Purpose: To evaluate the refractive and aberrometric changes in corneas with post-LASIK keratectasia implanted with intracorneal ring segments (ICRS) during a 2-year follow-up.

Design: Retrospective, consecutive case series.

Participants: Thirty-four eyes of 25 patients (age range, 20-59 years) with post-LASIK ectasia were included.

Refractive and corneal aberrometric changes after intracorneal ring implantation in corneas with pellucid marginal degeneration.

Purpose: To evaluate refractive, visual, and aberrometric changes in corneas with pellucid marginal degeneration (PMD) implanted with intracorneal ring segments (ICRS) during a 6-month follow-up.

Design: Retrospective, consecutive case series.

Participants: We included 21 consecutive eyes of 15 patients ranging in age from 21 to 73 years old and with a diagnosis of PMD.

Correction of severe ectasia after LASIK with intracorneal ring segments.

Purpose: To report a case of severe bilateral ectasia after LASIK that was treated with implantation of small-diameter Keraring intrastromal corneal ring segments (Mediphacos Ltd).

Methods: A 31-year-old woman underwent LASIK in 2001 at a different institution. One year after LASIK, the patient complained of decreased vision in the left eye and underwent LASIK retreatment.