PURPOSE We investigated the keratocyte response and stromal remodeling after corneal incision and photorefractive keratectomy to understand the histophysiological and immunohistochemical differences between these two types of surgery. METHODS Corneal incision or photorefractive keratectomy was performed in rabbits or rats. Then we chronologically observed the histological changes and the chan...

We have used the fluorescent dye dichlorotriazinyl aminofluorescein (DTAF) to demonstrate corneal remodeling following keratectomy in the rabbit. The dye was applied to the surface of 3.5 mm diameter anterior keratectomy wounds produced by either lamellar dissection or photoablation with an excimer laser (193 nm) to a depth of 15, 50 or 75 microns. Stromal wounds that had been ablated in 12 con...

purpose : to assess the safety, efficacy and predictability of photorefractive keratectomy (prk) [tissue-saving (ts) versus plano-scan (ps) ablation algorithms] of technolas 217z excimer laser for correction of myopic astigmatism methods : in this retrospective study one hundred and seventy eyes of 85 patients (107 eyes (62.9%) with ps and 63 eyes (37.1%) with ts algorithm) were included. ts al...

Stromal cornea tattooing has been used for esthetic treatment of corneal scars as leukoma and iris coloboma. The coloring agent can be applied through stromal micropuncture or associated with lamellar keratectomy or keratoplasty. We report a case of stromal tattooing associated with lamellar keratectomy in a patient's eye that had extensive leukoma and irregular corneal surface. Visual acuity i...

Four cases of conjunctival squamous carcinoma invading the cornea are presented. The surgical technique of excising the tumours from the cornea by lamellar keratectomy is described. Histology of the lesions showed well differentiated squamous carcinoma invading the superficial layers of the cornea only. Large invasive squamous cell carcinomas of the cornea result because of neglect of small par...

PURPOSE To report a specific line of research developed at the University of São Paulo/Brazil on fibrin glue used for sealing corneal perforations and the perspectives of use on non-perforated corneal ulcers and photorefractive keratectomy-operated corneas. METHODS To describe fibrin glue manufacture, development of a device to test the glued perforated corneal area resistance, subsequent exp...

To standardize the corneal haze model in the resection depth and size for efficient corneal haze development, air assisted lamellar keratectomy was performed. The ex vivo porcine corneas were categorized into four groups depending on the trephined depth: 250 µm (G1), 375 µm (G2), 500 µm(G3) and 750 µm (G4). The stroma was equally ablated at the five measurement sites in all groups. Significant ...

BACKGROUND The purpose of this paper is to report the successful treatment of corneal scarring and high corneal astigmatism secondary to previous pterygium surgery with diamond burr superficial keratectomy using mitomycin C. METHODS Four patients with corneal scarring and high corneal astigmatism related to previous pterygium surgery underwent diamond burr superficial keratectomy with applica...