purpose : to report a case of posterior keratoconus with atypical ocular findings case report : an 8-year-old boy was referred to our clinic with the chief complaint of blurred vision in his right eye. the patient had no history prior ocular surgery of trauma. her family history was also unremarkable. comprehensive ocular examination was performed. results : the patient's best spectacle co...

Purpose: To report a case of posterior keratoconus with atypical ocular findings Case report: An 8-year-old boy was referred to our clinic with the chief complaint of blurred vision in his right eye. The patient had no history prior ocular surgery of trauma. Her family history was also unremarkable. Comprehensive ocular examination was performed. Results: The patient's best spectacle corrected ...

To the Editor: In her recent editorial (Roberts C. The cornea is not a piece of plastic. J Refract Surg 2000;16:407-413), Dr. Roberts points out that biomechanical flattening enhances a myopic excimer laser ablation and works against a hyperopic ablation. Would the circular severing of corneal lamellae in hyperopic ablation not lead to a contraction of the central part of these lamellae with a ...

purpose: to determine the sensitivity and specificity of posterior corneal elevation in discriminating keratoconus and subclinical keratoconus from normal corneas by galilei and orbscan ii diagnosed on the basis of topography. methods: three groups (keratoconus, subclinical keratoconus and normal) were evaluated with galilei and orbscan ii and results were compared to those obtained by gold sta...

PURPOSE To analyze corneal curvature and visual acuity after asymmetric intrastromal corneal rings implantation, not following the nomogram proposed by the manufacturer. METHODS Seven eyes of seven keratoconus patients which had asymmetric corneal rings implanted in their corneal stroma were studied. RESULTS A flattening of the average corneal keratometry was noted in all patients, as well ...

PURPOSE To characterize the geometrical properties of keratoconic corneas upon intracorneal ring segments (ICRS) implantation, using custom-developed optical coherence tomography (OCT). METHODS Ten keratoconic corneas were measured pre- and post-ICRS surgery (7, 30, and 90 days). Corneal topographic and pachymetric maps were obtained from three-dimensional (3D) images acquired with OCT, provi...

Introduction. To determine the effect of corneal collagen cross-linking treatment on keratoconus and post-LASIK ectasia particularly after an abbreviated exposure to ultraviolet light exposure. Materials and methods. Fifty-one eyes of 34 patients were treated with epithelium-off UVA-riboflavin corneal collagen cross-linking for either 20 minutes or 30 minutes as part of a US.FDA clinical study....

Purpose To examine the refractive correction and corneal biomechanical strength after small incision lenticule extraction (SMILE) by using a 110- or 160-μm cap thickness. Methods Thirty-two human donor corneas were allocated into 4 groups, combining one of two cap thicknesses (110 and 160 μm) with one of two spherical corrections (-4 D and -8 D). Each cornea was mounted on an artificial anter...