Dependence of corneal hysteresis on non-central corneal thickness in healthy subjects.

Objective: To evaluate the dependence of corneal hysteresis (CH) on non-central corneal thickness.

Methods: Cross-sectional study of 1561 eyes of 1561 healthy volunteers with IOP less than 21mmHg, open angles on gonioscopy and no prior eye surgeries or local or systemic diseases. Pentacam-Scheimpflug technology was employed to segment the cornea into 6 circular zones centered on the apex (zones 1-6) and to determine the mean corneal thickness of these areas.

[Photodynamic therapy in severe chronic central serous chorioretinopaty].

Objective: To determine the efficacy of Photodynamic Therapy (PDT) in chronic Central Serous Chorioretinopathy (CSC).

Methods: Patients diagnosed with chronic CSC, with clinical evidence of activity and treated with Photodynamic Therapy, are included in this report. All were assessed by a complete ophthalmological examination, including assessment of the best corrected visual acuity (BCVA) using an ETDRS chart, fluorescein and indocyanine angiography and optical coherence tomography (OCT).

[Reduction of corneal permeability in patients treated with HP-guar: a fluorophotometric study].

Introduction: The incidence of dry eye disease, which mainly affects the corneal epithelium, is rising. The main treatment is still the use of artificial tears capable of improving the humidification and lubrication of the corneal epithelium, and avoiding its progressive functional failure. HP-Guar is a new compound used for this purpose.