Corneal clarity restoration after Descemet stripping automated endothelial keratoplasty with edematous corneal graft.

Purpose: To report a case of a patient who underwent Descemet stripping automated endothelial keratoplasty (DSAEK) with implantation of a precut edematous corneal graft, and restored corneal clarity 3 months postoperatively.

Methods: Case report.

Results: A 54-year-old woman underwent DSAEK due to Fuchs endothelial dystrophy.

In vivo evaluation of blue-light attenuation with tinted and untinted intraocular lenses.

Purpose: To evaluate blue-light attenuation in eyes with a tinted intraocular lens (IOL) or an untinted IOL.

Setting: Department of Ophthalmology, University Hospital of Crete, Crete, Greece.

Design: Comparative case series.

Management of post laser in situ keratomileusis ectasia with simultaneous topography guided photorefractive keratectomy and collagen cross-linking.

A thirty-nine year old man was referred to our institute due to progressive decreased visual acuity five years after bilateral Laser in situ Keratomileusis (LASIK). Topography revealed signs of post - LASIK ectasia. Patients' left eye was treated with simultaneous Topography Guided Photorefractive Keratectomy (PRK) followed by Corneal Collagen Cross Linking (CXL).

Combined corneal collagen cross-linking and posterior chamber toric implantable collamer lens implantation for keratoconus.

A 29-year-old woman with keratoconus underwent posterior chamber toric implantable Collamer lens (Visian ICL; STAAR Surgical, Monrovia, CA) implantation 12 months after corneal collagen cross-linking with riboflavin and ultraviolet radiation-A. No intraoperative or postoperative complications were observed. Three months postoperatively, uncorrected distance visual acuity improved from counting fingers to 20/40 and corrected distance visual acuity improved from 20/100 to 20/30.

Descemet stripping automated endothelial keratoplasty combined with phacoemulsification in Chandler syndrome.

Purpose: To report a case of Descemet stripping automated endothelial keratoplasty (DSAEK) in combination with phacoemulsification and implantation of intraocular lens (IOL) (triple procedure) in a patient with Chandler syndrome.

Methods: A patient with visually significant corneal edema due to Chandler syndrome and cataract underwent DSAEK combined with phacoemulsification and IOL implantation (DSAEK triple procedure).

Results: One year postsurgery, the patient's uncorrected distance visual acuity improved from counting fingers to 20/63, and the corrected distance visual acuity to 20/32.

Automated donor tissue preparation for descemet membrane automated endothelial keratoplasty (DMAEK): an experimental study.

Background And Objective: Graft harvesting for Descemet membrane endothelial keratoplasty (DMEK) occurs manually and demonstrates surgical difficulties. In the current study, a mechanical automated technique for preparing a donor Descemet membrane (DM) carrying autologous endothelium for DMEK was evaluated.

Materials And Methods: Ten rabbit corneas were placed on an artificial anterior chamber and mechanical separation of the DM was conducted using an Epi-keratome (Senturium; Norwood Abbey EyeCare, Victoria, Australia).

Transepithelial Phototherapeutic Keratectomy Using a 213-nm Solid-State Laser System Followed by Corneal Collagen Cross-Linking with Riboflavin and UVA Irradiation.

Purpose. To present a case of a keratoconic patient who underwent epithelial removal with transepithelial phototherapeutic keratectomy (t-PTK) using a 213-nm solid-state laser system followed by corneal collagen cross-linking (CXL) with riboflavin and ultraviolet-A (UVA) irradiation. Methods.

Photorefractive keratectomy followed by same-day corneal collagen crosslinking after intrastromal corneal ring segment implantation for pellucid marginal degeneration.

A 28-year-old man with progressive pellucid marginal degeneration (PMD) had photorefractive keratectomy (PRK) followed by same-day corneal collagen crosslinking (CXL) for progressive PMD 12 months after intrastromal corneal ring segment implantation (Intacs). No intraoperative or early postoperative complications occurred. Nine months postoperatively, the uncorrected distance visual acuity improved from finger counting to 20/63 and the corrected distance visual acuity improved from 20/40 to 20/25.

Intraocular pressure measurements after corneal collagen crosslinking with riboflavin and ultraviolet A in eyes with keratoconus.

Purpose: To determine the possible effect of corneal collagen crosslinking (CXL) with riboflavin and ultraviolet A (UVA) on intraocular pressure (IOP) measurements by Goldmann applanation tonometry (GAT).

Setting: Institute of Vision and Optics, Faculty of Medicine, University of Crete, Heraklion, Crete, Greece.

Design: Prospective case series.

Interface corneal stromal irregularities after flap creation using femtosecond laser.

Purpose: To report a case of interface corneal stromal irregularities after flap creation with the advanced IntraLase femtosecond (150 Hz) laser system (Abbott Medical Optics, Inc.).

Methods: Case report.

Unintended epithelium-only flap creation using a femtosecond laser during LASIK.

Purpose: to present a patient in whom, during LASIK with the IntraLase femtosecond laser (Abbott Medical Optics), unintended epithelial (instead of anterior stromal) flaps were created in both eyes.

Methods: a 28-year-old man underwent bilateral LASIK using the IntraLase femtosecond laser programmed to create 100-microm flaps. Flap creation was performed uneventfully in both eyes but flap thickness was thinner than attempted.

Posterior linear stromal haze formation after simultaneous photorefractive keratectomy followed by corneal collagen cross-linking.

Purpose: To report the development of posterior linear stromal haze after simultaneous photorefractive keratectomy (PRK) followed by corneal collagen cross-linking (CXL).

Methods: Combined simultaneous customized PRK followed by corneal collagen cross-linking was performed in 23 patients (28 eyes) with keratoconus. Corneas were examined biomicroscopically and by means of confocal microscopy before surgery and 1, 3, 6, 9, and 12 months after surgery.

Evaluation of image quality metrics for the prediction of subjective best focus.

Purpose: Seven existing and three new image quality metrics were evaluated in terms of their effectiveness in predicting subjective cycloplegic refraction.

Methods: Monochromatic wavefront aberrations (WA) were measured in 70 eyes using a Shack-Hartmann based device (Complete Ophthalmic Analysis System; Wavefront Sciences). Subjective cycloplegic spherocylindrical correction was obtained using a standard manifest refraction procedure.

Nine-year follow-up of intacs implantation for keratoconus.

Purpose: To present a case of nine- year bilateral Intacs (Addition Technology, Inc, Fremont, California, USA) implantation for early stage keratoconus.

Methods: A 25-year-old male underwent bilateral Intacs implantation for the management of keratoconus and hardcontact-lens intolerance (stage 1) in 1999.

Results: Nine years postoperatively, spherical equivalent refraction changed from preoperative -0.

LASIK flap buttonhole treated immediately by PRK with mitomycin C.

Purpose: To describe the visual outcomes of three patients who had LASIK flap buttonhole and were treated immediately with photorefractive keratectomy (PRK) and topical mitomycin C (MMC) 0.02%.

Methods: Three patients underwent bilateral LASIK with the SCHWIND Carriazo-Pendula 90 microm head microkeratome.

New INTACS SK implantation in patients with post-laser in situ keratomileusis corneal ectasia.

In this case series, 2 patients with post-laser in situ keratomileusis corneal ectasia were included. Patients were treated with new intrastromal corneal ring segments, INTACS SK (severe keratoconus or steep "K") (Addition Technology, Inc, Des Plaines, IL) implantation. Two segments were inserted without any intraoperative or postoperative complications.

Efficacy of 2 types of silicone hydrogel bandage contact lenses after photorefractive keratectomy.

Purpose: To compare the efficacy of 2 types of silicone hydrogel bandage contact lenses with high oxygen transmissibility after photorefractive keratectomy (PRK).

Setting: Institute of Vision and Optics, Faculty of Medicine, University of Crete, Heraklion, Crete, Greece.

Methods: In this prospective study, 1 eye of patients having bilateral PRK was randomly fitted with a bandage contact lens of lotrafilcon A (Night & Day) and the fellow eye, with a bandage contact lens of lotrafilcon B (O(2)Optix).

Fifteen-year follow-up after anterior chamber phakic intraocular lens implantation in one and LASIK in the fellow eye.

Purpose: To report a patient fifteen years after anterior chamber phakic intraocular lens (AC-PIOL) implantation in one and laser in situ keratomileusis (LASIK) in the fellow eye.

Methods: Case report.

Results: A 56-year-old male underwent AC-PIOL implantation in one eye and LASIK in the fellow eye fifteen years ago.

Intraoperative pachymetric measurements during corneal collagen cross-linking with riboflavin and ultraviolet A irradiation.

Objective: To study central corneal pachymetric variations during corneal collagen cross-linking (CXL) treatment with the use of riboflavin and ultraviolet A irradiation (UVA).

Design: Prospective, noncomparative, interventional clinical study.

Participants: Fifteen keratoconic patients (19 eyes) were enrolled.

Mitomycin C aqueous humor concentration after photorefractive keratectomy: an experimental study.

Purpose: To evaluate mitomycin C (MMC) aqueous humor concentration after photorefractive keratectomy (PRK).

Methods: In this experimental study, twenty-four eyes of 12 male pigmented rabbits were divided into 4 groups and studied at the Institute of Vision and Optics, Department of Medicine, University of Crete, Greece. Eyes in groups 1 and 2 underwent PRK to correct -5 diopters (D) in a 6-mm optical zone, while sponges soaked with 0.

Simultaneous topography-guided PRK followed by corneal collagen cross-linking for keratoconus.

Purpose: To present the results after simultaneous photorefractive keratectomy (PRK) followed by corneal collagen cross-linking (CXL) for progressive keratoconus.

Methods: Twelve patients (14 eyes) with progressive keratoconus were prospectively treated with customized topography-guided PRK with the Pulzar Z1 (wavelength 213 nm, CustomVis) immediately followed by corneal collagen CXL with the use of riboflavin and ultraviolet A irradiation.

Results: Mean follow-up was 10.

Management of pellucid marginal corneal degeneration with simultaneous customized photorefractive keratectomy and collagen crosslinking.

A 34-year-old woman had simultaneous photorefractive keratectomy and corneal collagen crosslinking with riboflavin-ultraviolet-A irradiation for the treatment of progressive pellucid marginal corneal degeneration in both eyes. No intraoperative or early postoperative complications occurred. Twelve months postoperatively, the uncorrected visual acuity was assessed at 20/40 in both eyes compared with counting fingers preoperatively.

Summation characteristics of the detection of compound gratings.

Many classical experiments have shown that two superimposed gratings are more easily detected than a single grating, in keeping with probability theory. Here we test the rules for the detection of 2-component compound gratings by extending the range of parameters used in previous experiments. Two complementary methods of deriving summation indices are described.

Narrow angle light scatter in rabbit corneas after excimer laser surface ablation.

Corneal haze following excimer laser ablation is an adverse after-effect of photorefractive keratectomy (PRK) and is associated with the development of subepithelial opacities. The present work pertains to the measurement of light scattering in rabbit corneas following excimer laser treatment; to the microscopic analysis of the light-scattering corneal structures; and to the development of a mathematical model of light propagation through the post-laser treatment cornea. Photorefractive keratectomy (PRK-6D, 6 mm optical zone) followed by standard postoperative pharmaceutical treatment was performed on rabbit eyes.