Active clinical trials for "Corneal Opacity"

surgical correction of ametropia. A number of improvements have been introduced to overcome the side effects and complications such as corneal haze, epithelial irregularities induced by wound healing, pain and delayed visual acuity recovery associated with PRK surgery. During traditional PRK, the corneal epithelium is mechanically debrided before stromal ablation is performed. Alcohol PRK is frequently used as an alternative to mechanical epithelial debridement and is considered simpler and faster. Transepithelial PRK (TransPRK) is a new method in which the corneal epithelium is photoablated by the laser in one step using a specific ablation profile. This study attempts to establish a means of quantitatively and objectively measuring corneal haze, using patented software based on optical coherence tomography (OCT) of the cornea. This will confirm or refute the hypothesis of a lower occurrence of corneal haze after TransPRK (experimental group) versus PRK with alcohol (control group). Each patient will have one eye randomised to one of the two groups being compared.

Optical Coherence Tomography (OCT) machines are non-contact instruments that can measure the depth of scars and other causes of cloudiness in the front of the cornea. The purpose of this study is to determine whether OCT-guided settings for the lasers used for removal of corneal scars and other partial-thickness corneal defects result in improved vision in patients receiving these procedures.

This is a comparative, open label, parallel group, non interventional study aims to assess the effect of Ectoine containing eye drops on stromal haze, pain and epithelial healing after Photorefractive keratectomy (PRK). The patient apply Ectohylo eye drops (Ectoine +Sodium Hyauronate) in the right eye and Polyfresh Extra eye drops (Carboxymethyl cellulose + Sodium Hyauronate ) in the left eye plus the routine post PRK treatment in both eyes. Post operative pain , epithelial healing and corneal densitometry is observed in both eyes.

A Single Arm, Pivotal, Open Label, Multicenter Clinical Investigation to Evaluate the Clinical Safety and Performance of the CorNeat Keratoprosthesis, for Treatment of Corneal Blindness

Purpose To evaluate the use of mitomycin-C (MMC) as an intraoperative adjunct during photorefractive keratectomy (PRK), its effect on postoperative healing and its ability to reduce the postoperative topical steroid course after the surgery. Research Design This is a single-center, prospective, comparative cohort study. Hypothesis There will not be a significant difference in the refractive corrections amongst the treatment groups, 12 months after surgery. Objectives The primary study objective is to compare the effect of intraoperative MMC and a postoperative short topical steroid taper of 3 weeks, intraoperative MMC and a rapid topical steroid taper of 1 week, and a more commonly accepted postoperative regimen of a 2 month long topical steroid taper without any intraoperative MMC. The primary endpoint evaluated will be objective estimates of refractive error (WaveScan WaveFront™ System) at 12 months post-surgery. Secondarily, the extent of haze formation will be evaluated objectively using densitometry maps generated by automated Scheimpflug imaging of the cornea (Pentacam®). Furthermore, the subjective vision from the patients' perspective will be evaluated by questionnaires.

CoRDS, or the Coordination of Rare Diseases at Sanford, is based at Sanford Research in Sioux Falls, South Dakota. It provides researchers with a centralized, international patient registry for all rare diseases. This program allows patients and researchers to connect as easily as possible to help advance treatments and cures for rare diseases. The CoRDS team works with patient advocacy groups, individuals and researchers to help in the advancement of research in over 7,000 rare diseases. The registry is free for patients to enroll and researchers to access. Visit sanfordresearch.org/CoRDS to enroll.

A prospective observational study on corneal opacities (scar and stromal dystrophy) in adults (n=150) will be conducted at OHSU. The Optovue anterior segment OCT will be used to perform 3-D corneal scans. These scans will be used to assess opacity depth and measure corneal thickness (pachymetry), corneal topography (anterior and posterior), and epithelial thickness maps. The ultrahigh-speed MIT OCT prototypes will also be used when they become available. A comprehensive eye examination, Placido-ring corneal topography, ultrasound pachymetry, and Scheimpflug camera imaging, will be performed for comparison.

This main goal of this study is to improve the detection, classification, monitoring, and treatment of irregular corneas due to keratoconus, warpage, dry eye, scar, stromal dystrophies, and other corneal conditions. The primary goal will be achieved by using optical coherence tomography (OCT) to: Develop an OCT-based system to classify and evaluate corneal-shape irregularities. Develop OCT metrics for more sensitive detection of keratoconus progression. Develop OCT-and-topography guided phototherapeutic keratectomy (PTK) for irregular corneas.

To evaluate the safety and probable benefit of the KeraKlear Non-Penetrating Keratoprosthesis when implanted in an eye with corneal opacity that is at high risk of complications with PK.

Prospective, open label, single arm, First in Human (FIH) clinical study to assess safety and efficacy of the CorNeat Keratoprosthesis, a synthetic cornea, for the treatment of corneal blindness