The intrastromal corneal ring implant surgery is becoming a surgical procedure in the treatment of keratoconus additive in order to minimize and delay the complications inherent to the pathology. Its action consists in the remodeling cornea, flattening and regulating the central corneal surface. Nowadays with the advent of new technologies, there is an important contribution in the diagnosis of keratoconus, with not only diagnosis but also more effective with better monitoring and prognosis of patients with this disorder ectatic. In […]

We present a case of late high progressive astigmatism following penetrating keratoplasty for keratoconus, which was associated with peripheral thinning in the donor-receptor area, which may be recognized as recurrence of ectasia. Treatment was accomplished with Cvintal’s Topoplasty assisted by femtosecond laser for a “top hat”, followed by resuture with peroperative adjustment guided by ceratoscopy.

The methodology currently used for interpretation of the cornea and anterior segment tomography for the diagnosis of corneal ectasia. Description of the clinical interpretation of anterior segment tomography (Pentacam – Oculus, Wetzlar, Germany); case report of the ectopia lentis demonstrating the importance o evaluation of the cornea and anterior segment of the keratoconus. We excluded the disease, analyzing the tomographic analysis of rates of ectasia and observe an asymmetry between nasal and temporal sides in assessing the depth map of […]

OBJECTIVE: To evaluate the safety of PRK in patients with atypical corneal topography, but without features of keratoconus in Pentacam. METHODS: Medical records of patients who underwent PRK method that presented atypical corneal topography and Pentacam rates considered normal in the pre operative were analyzed. The sample consisted of nineteen eyes of ten patients. The considered criteria of corneal irregularity were: increased curvature greater than 47D with asymmetry less than 1,5D, 1,5D displacement above the apex and inferior-superior asymmetry greater […]

PURPOSE: The methodology currently used for interpretation of the cornea and anterior segment tomography for the diagnosis of corneal ectasia and its susceptibility. METHODS: Description of the methodology and clinical interpretation of corneal and anterior segment tomography indexes; report of three cases demonstrating the importance of this new diagnostic tool (Pentacam HR®) in ophthalmological practice. CONCLUSION: The use of corneal and anterior segment tomography seems to be an effective method to increase the sensitivity and specificity for the diagnosis and […]

PURPOSE: To evaluate the contact lenses fitting with respect to visual improvement in patients with keratoconus. METHODS: We conducted a prospective study of 54 patients (99 eyes) attending the Contact Lens Clinic of Faculdade de Medicina do ABC (FMABC) from january 2010 to november 2010. Data were collected on gender, age, treated eyes, degree of keratoconus, initial visual acuity (VA) and final VA after fitting. RESULTS: Of the patients, 44% were women and 56% men. Forty-six point forty-seven percent of […]

PURPOSE: To compare topographic features of patients with keratoconus between two systems: Orbscan IIz® (Bausch & Lomb, Rochester, New York, USA) and Wavetek Chroma®. METHODS: Twenty-nine patients that were diagnosed with keratoconus based on clinical and topographic characteristics were evaluated on their visit to Ophthalmology Hospital of Sorocaba in March 2010. Topographic variables, like maximum and minimum keratometric readings (Sim K) within 3 and 5 mm of central zone, and maximum keratometry, were analyzed by Orbscan IIz® and Wavetek Chroma®. […]

OBJECTIVE: To verify possible correlations between the biomechanical state of the cornea before surgery and the results of stromal ring segments implant for keratoconus. METHODS: Nineteen eyes of 19 patients with keratoconus were evaluated before and 12 months after stromal ring segment implant surgery. The implant of one or two Ferrara ring segments was performed accordingly to the nomogram, considering corneal thickness, ectasy pattern on topography and astigmatism. The Wilcoxon test was performed to verify the differences between visual acuity […]