Morphological Features Among Gaussian, Sagittal, and Tangential Curvature Maps in Normal and Keratoconus Eyes Using Anterior Segment Optical Coherence Tomography.

Purpose: To investigate and compare the morphological features and differences among Gaussian, Sagittal, and Tangential anterior corneal curvature maps obtained with an anterior segment optical coherence tomographer combined with a Placido disc MS-39 device in keratoconus (KC) and normal eyes.

Methods: Prospective, cross-sectional study including 37 KC and 51 healthy eyes. The pattern of astigmatism and maximum keratometry (Kmax), keratometry at the thinnest point (Ktp) and 2 mm diameter (K 2mm ), and inferior-superior dioptric asymmetry values were obtained and calculated from Gaussian, Tangential, and Sagittal curvature maps using the MS-39 (CSO).

Biometric and corneal characteristics in marfan syndrome with ectopia lentis.

Purpose: To describe the biometric and corneal characteristics of patients with Marfan Syndrome (MFS) and ectopia lentis.

Study Design: Observational, descriptive, prospective study. Subjects Individuals with MFS with ectopia lentis (EL).

Long Term Corneal Flattening After Corneal Crosslinking in Patients with Progressive Keratoconus.

Purpose: We evaluate the long-term visual, refractive, and keratometric outcomes after corneal crosslinking (CXL) in patients with progressive keratoconus (KC) and the incidence of an extreme corneal flattening effect.

Settings: Oftalmosalud Institute of Eyes, Lima, Perú.

Design: Retrospective cohort study.

Interface Fluid Syndrome After Descemet Membrane Endothelial Keratoplasty in Patients With History of LASIK.

Purpose: The aim of this study was to evaluate the visual, pachymetric, tomographic, and biomicroscopic findings in a series of cases with laser in situ keratomileusis (LASIK) flap interface fluid syndrome (IFS) after Descemet membrane endothelial keratoplasty (DMEK).

Methods: Six cases were included in this study; all patients had a history of LASIK and underwent DMEK for the treatment of bullous keratopathy. After uneventful surgery, all patients presented with corneal edema and IFS under the LASIK flap, which was demonstrated with anterior segment optical coherence tomography (AS-OCT).

Comparison of preoperative simulated and postoperative real safety distances using anterior segment OCT in patients with phakic IOL according to iris configuration.

Aim: To compare the simulated safe distance (SSD) preoperatively versus real safe distance (RSD) postoperatively in patients with iris-claw phakic intraocular lens (pIOL) implantation according to iris configuration.

Methods: Totally 60 eyes of 60 patients underwent pIOL implantation for surgical correction of myopia. Anterior chamber depth (ACD) was measured with the IOLMaster 700, and nasal and temporal safety distances (SD) were measured pre- and postoperatively using Anterior Segment Visante-OCT.

Repeatability of Corneal Deformation Response Parameters by Dynamic Ultra High-speed Scheimpflug Imaging in Normal and Keratoconus Eyes.

Purpose: To assess the repeatability of corneal dynamic response (CDR) parameters in normal and keratoconus (KC) eyes using ultra high-speed Scheimpflug imaging.

Methods: Prospective, comparative, observational study, including eyes of 112 patients that underwent high-speed Scheimpflug imaging analysis (Corvis ST, OCULUS). Twenty-one CDR parameters were evaluated to asses repeatability using: coefficient of repeatability (CR), coefficient of variation, intraclass correlation coefficient (ICC) and within-subject SD.

Comparing the vision quality using double-pass technique in eyes with corrected refractive errors and emmetropic eyes.

Purpose: To evaluate the vision quality by measuring the objective light scatter index and objective optical quality parameters (Strehl Ratio and Modulation Transfer Function) in patients with emmetropia and ametropia.

Methods: This prospective, cross-sectional study included 408 eyes. The ametropic group comprised of eyes with best-corrected visual acuity of 0.

Intracorneal circular ring implant with femtosecond laser: Pocket versus tunnel.

Purpose: To evaluate and compare visual and refractive outcomes after implantation of the intracorneal continuous ring 360° arc (ICCR) versus the intracorneal ring segment 340° arc (ICRS) using femtosecond laser for central keratoconus.

Setting: Research Department, Oftalmosalud, Instituto de Ojos, Lima, Peru.

Methods: Randomized study that included 40 eyes of 32 patients diagnosed with central keratoconus between November 2014 and March 2015.

Automated Keratopigmentation in Boston Type 1 Keratoprosthesis: An Aesthetic Alternative.

Two male patients, aged 64 and 55 years old, presented at the cornea department for a Boston type 1 keratoprosthesis (Kpro I) implantation after multiple corneal graft failures. After surgery, they achieved a best corrected visual acuity of 20/200 and 20/150, respectively. However, they manifested photophobia and aesthetic complaints.

Accelerated Epi-On Versus Standard Epi-Off Corneal Collagen Cross-Linking for Progressive Keratoconus in Pediatric Patients: Five Years of Follow-Up.

Purpose: The purpose of this study was to evaluate and compare the 5-year efficacy and safety of accelerated transepithelial (A-epi-on) corneal collagen cross-linking (CXL) with standard CXL (epi-off) in children with progressive keratoconus (KC).

Methods: This prospective cohort study included 78 eyes of patients aged 18 years old or younger with progressive KC who underwent CXL at the Oftalmosalud Institute of Eyes, Lima, Peru. A-epi-on CXL was performed in 32 eyes (30' of impregnation/5' of irradiation at 18 mW/cm2) and epi-off CXL was performed in 46 eyes (30'of impregnation/30' minutes of irradiation at 3 mW/cm2).

Corneal lenticule extraction assisted by a low-energy femtosecond laser.

A lenticule of intrastromal corneal tissue was cut together with 2 small incisions of 3.0 mm using a low-energy femtosecond laser system, FEMTO LDV Z8; 1 incision led to the posterior plane and 1 to the anterior, allowing dissection of the lenticule. When needed, recentering of the treatment area was possible without repeating the docking stage.

Effectiveness and agreement of 3 optical biometers in measuring axial length in the eyes of patients with mature cataracts.

Purpose: To evaluate the effectiveness and agreement of 3 optical biometers in measuring axial length (AL) and biometric parameters in the eyes of patients with mature cataracts.

Setting: Oftalmosalud Instituto de Ojos, Peru.

Design: Prospective, comparative study.

Comparison of eye-rubbing effect in keratoconic eyes and healthy eyes using Scheimpflug analysis and a dynamic bidirectional applanation device.

Purpose: To compare the effect of eye rubbing on Scheimpflug imaging parameters and corneal biomechanics in eyes with keratoconus and healthy eyes.

Setting: Oftalmosalud Instituto de Ojos, Lima, Peru.

Design: Prospective cohort study.

Long-term efficacy and safety after corneal collagen crosslinking in pediatric patients: Three-year follow-up.

Purpose: To evaluate the effectiveness of standard corneal collagen crosslinking for children with progressive keratoconus.

Methods: Prospective study including 26 eyes of 26 patients younger than 18 years old with progressive keratoconus at Oftalmosalud Instituto de Ojos, Lima, Peru. Standard epi-off corneal crosslinking was performed in all eyes between January 2012 and January 2013.

Accelerated Epi-On Versus Standard Epi-Off Corneal Collagen Cross-Linking for Progressive Keratoconus in Pediatric Patients.

Purpose: To evaluate and compare the effectiveness and safety of accelerated transepithelial (A-epi-on) corneal collagen cross-linking (CXL) with standard CXL (epi-off) for children with progressive keratoconus.

Methods: Prospective, cohort study including 61 eyes of 51 patients younger than 18 years with progressive keratoconus at Oftalmosalud Instituto de Ojos, Lima, Peru. A-epi-on CXL was performed for 36 eyes using 30 minutes of impregnation (0.