This essay explains the essential principle for the determination of oxygen permeability by the FATT method, and introduces the specific testing procedure and the method for data processing.
Algorithms ; Contact Lenses, Hydrophilic ; standards ; Corneal Diseases ; etiology ; prevention & control ; Humans ; Materials Testing ; methods ; Oxygen ; metabolism ; Oxygen Consumption ; physiology ; Permeability

PURPOSE: To determine the effect of the base curve radius (BCR) of therapeutic soft contact lens (T-lens) on epithelial healing after laser-assisted subepithelial keratectomy (LASEK). METHODS: Ninety-two eyes in 47 patients with myopia were prospectively evaluated after LASEK. All the patients wore T-lenses with the BCR (R1) randomly chosen after LASEK. The T-lenses were removed after complete healing of the epithelial wounds. We calculated an estimated BCR (R2) from postoperative topography using a diopter conversion table. The patients were divided into two groups according to the differences between the BCR (R1) and the estimated BCR (R2). The flat fitting group was R1 > R2 (Group A), and the steep fitting group was R1R2) had 53 eyes, and Group B (R1 Adult ; Contact Lenses, Hydrophilic/*standards ; Epithelium, Corneal/*pathology ; Equipment Design ; Female ; Follow-Up Studies ; Humans ; Keratectomy, Subepithelial, Laser-Assisted/*methods ; Male ; Postoperative Period ; Prospective Studies ; Refraction, Ocular ; Refractive Errors/pathology/*therapy ; Surface Properties ; Treatment Outcome ; Visual Acuity ; *Wound Healing

PURPOSE: To determine the effect of the base curve radius (BCR) of therapeutic soft contact lens (T-lens) on epithelial healing after laser-assisted subepithelial keratectomy (LASEK). METHODS: Ninety-two eyes in 47 patients with myopia were prospectively evaluated after LASEK. All the patients wore T-lenses with the BCR (R1) randomly chosen after LASEK. The T-lenses were removed after complete healing of the epithelial wounds. We calculated an estimated BCR (R2) from postoperative topography using a diopter conversion table. The patients were divided into two groups according to the differences between the BCR (R1) and the estimated BCR (R2). The flat fitting group was R1 > R2 (Group A), and the steep fitting group was R1R2) had 53 eyes, and Group B (R1 Adult ; Contact Lenses, Hydrophilic/*standards ; Epithelium, Corneal/*pathology ; Equipment Design ; Female ; Follow-Up Studies ; Humans ; Keratectomy, Subepithelial, Laser-Assisted/*methods ; Male ; Postoperative Period ; Prospective Studies ; Refraction, Ocular ; Refractive Errors/pathology/*therapy ; Surface Properties ; Treatment Outcome ; Visual Acuity ; *Wound Healing