Evaluation of Corneal Biomechanical Changes After Collagen Crosslinking in Patients with Progressive Keratoconus by Ocular Response Analyzer.

Objectives: To evaluate corneal biomechanics before and after collagen crosslinking (CXL) in patients with progressive keratoconus.

Materials And Methods: In this prospective study, CXL was performed under topical anesthesia after removal of the epithelium (epi-off technique) by applying ultraviolet A (UVA) light at a wavelength of 365 nm and power of 3 mW/cm2 or 5.4 joule/cm2.

Pregnancy and the Eye.

Pregnancy causes significant changes in all systems of the body. Although most of them are physiological, they may also lead to pathological consequences. The resulting pathological changes may occur for the first time or existing diseases affected by pregnancy can become more serious or change course.

The complementary benefit of anterior segment optical coherence tomography in penetrating keratoplasty.

Purpose: To evaluate the utility of anterior segment optical coherence tomography (AS-OCT) assessment in the pre- and postsurgical management of full-thickness corneal grafts.

Methods: Seventy eyes of 58 patients who had penetrating keratoplasty were included in the study. High resolution AS-OCT scans of the cornea and the anterior segment were performed before and after transplantation in 17 eyes with the Visante™ optical coherence tomography.

Intraoperative use of AS-OCT during intrastromal corneal ring segment implantation.

Background And Objective: To evaluate femtosecond laser-created tunnels intraoperatively by anterior segment optical coherence tomography (AS-OCT) during intrastromal corneal ring segment implantation.

Patients And Methods: The study prospectively examined 13 eyes of 11 patients who underwent intrastromal corneal ring segment surgery with the aid of femtosecond laser. All eyes had keratoconus as the primary diagnosis.

Assessment of intrastromal corneal ring segment position with anterior segment optical coherence tomography.

Background And Objective: To examine the exact position of implanted Keraring (Mediphacos, Belo Horizonte, Brazil) segments by high-resolution anterior segment optical coherence tomography (AS-OCT).

Patients And Methods: This study included 17 eyes of 13 patients with keratoconus who underwent uneventful intracorneal ring segment implantation with the aid of femtosecond laser. Eyes were evaluated by AS-OCT at the third postoperative month.

Comparison of non-contact methods for the measurement of central corneal thickness.

Background And Objective: This study examined the repeatability of and agreements between central corneal thickness measurements obtained by four different non-contact pachymetry devices.

Patients And Methods: Seventy-eight eyes of 39 subjects were included. Central corneal thickness of each eye was measured by Visante optical coherence tomography (OCT) (Carl Zeiss Meditec Inc.

Cataract surgery in a patient with amyotrophic lateral sclerosis: a case report.

We report a cataract operation with complications in a patient with amyotrophic lateral sclerosis (ALS). The patient had a grade 4 mature brown cataract. Phacoemulsification with intraocular lens (IOL) implantation was planned; however, due to unexpected complications occurring during surgery, the operating technique was revised to an intracapsular cataract extraction.

Corneal biomechanical properties of patients with pseudoexfoliation syndrome.

Purpose: To assess the corneal biomechanical properties of patients with pseudoexfoliation syndrome (PEX syndrome).

Methods: Fifty-two eyes of 52 patients (27 unilateral and 25 bilateral) and 42 eyes of 42 age-matched control subjects were enrolled in the study. Metrics of corneal biomechanical properties, including corneal hysteresis (CH) and corneal resistance factor (CRF), were measured with the ocular response analyzer (ORA).

Influence of intrastromal corneal ring segment implantation on corneal biomechanical parameters in keratoconic eyes.

Purpose: To assess the influence of intrastromal corneal ring segment (ICRS) implantation on corneal biomechanics in patients with keratoconus.

Methods: Patients with keratoconus who underwent femtosecond laser-assisted ICRS (Keraring) implantation were evaluated with the ocular response analyzer (ORA). Metrics of corneal biomechanical parameters, including corneal hysteresis (CH) and corneal resistance factor (CRF) were measured both before and after surgery.

AS-OCT as a tool for flap thickness measurement after femtosecond-assisted LASIK.

Background And Objective: to investigate the efficacy of anterior segment optical coherence tomography (AS-OCT) for calculating flap thickness in femtosecond laser-assisted laser in situ keratomileusis.

Patients And Methods: fifty-one eyes of 26 patients with myopia and myopic astigmatism were included in this prospective study. High-resolution corneal images were evaluated at 1 week and 1 month postoperatively.

Changes in corneal biomechanics in patients with keratoconus after penetrating keratoplasty.

Purpose: To examine the biomechanical properties of keratoconic eyes following penetrating keratoplasty and to compare results with the biomechanical characteristics of manifest keratoconus, forme fruste keratoconus and normal eyes as measured with the Reichert ocular response analyzer (ORA).

Methods: This retrospective analysis comprised a total of 169 eyes: 34 eyes with forme fruste keratoconus (group FF), 36 eyes with manifest keratoconus (Group KC), 36 eyes that have undergone penetrating keratoplasty (Group PK) and a control group of 63 normal eyes (Group N). Corneal hysteresis (CH), corneal resistance factor (CRF), corneal compensated intraocular pressure, and Goldmann correlated intraocular pressure were measured by ORA.

Immediate evaluation of the flaps created by femtosecond laser using anterior segment optical coherence tomography.

Background And Objective: To demonstrate the practical and functional evaluation of flaps created intraoperatively by femtosecond laser using anterior segment optical coherence tomography (AS-OCT).

Patients And Methods: The study prospectively examined 11 eyes of 6 patients who underwent uneventful LASIK surgery with the aid of the IntraLase femtosecond laser (IntraLase Corp., Irvine, CA).

Corneal biomechanical properties and intraocular pressure changes after phacoemulsification and intraocular lens implantation.

Purpose: To evaluate corneal viscoelastic and intraocular pressure (IOP) changes measured by an ocular response analyzer (ORA) after phacoemulsification and intraocular lens (IOL) implantation.

Setting: Yeditepe University Department of Ophthalmology, Istanbul, Turkey.

Methods: Fifty-one eyes scheduled for cataract surgery were included in the study.

Anterior segment optical coherence tomography measurement of anterior chamber depth and angle changes after phacoemulsification and intraocular lens implantation.

Purpose: To use anterior segment optical coherence tomography (AS-OCT) to evaluate anterior chamber depth (ACD) and angle after phacoemulsification and intraocular lens (IOL) implantation.

Setting: Department of Ophthalmology, Yeditepe University, Istanbul, Turkey.

Methods: Forty-seven eyes (37 patients) had uneventful phacoemulsification and IOL implantation through a clear corneal incision.