Search results for "Segmento anterior"
showing 3 items of 3 documents
Estudio de las ampollas conjuntivales tras la ciruga filtrante con válvula ExPRESS mediante topografía de coherencia óptica de segmento anterior
2021
La cirugía con implante ExPRESS es muy utilizada en el tratamiento del glaucoma. A pesar de esto existen pocos estudios que evalúen la morfología de las ampollas de filtración resultantes tras su implante; por esta razón utilizamos la tomografía de coherencia óptica de segmento anterior para analizarlas. Se realizó un estudio prospectivo, consecutivo no aleatorizado donde se estudiaron 36 ampollas de filtración derivadas de la implantación del dispositivo ExPRESS. Los pacientes fueron evaluados el primer, tercer, sexto, noveno y duodécimo mes tras la cirugía. Se creó una base de datos con las siguientes variables: agudeza visual mejor corregida (AVMC), presión intraocular (PIO), altura de l…
Avaliação por OCT in vivo do comprimentos axiais centrais do segmento anterior
2017
ABSTRACT Purpose: To assess changes in anatomic structures in the anterior eye segment in terms of axial lengths with accommodation via optical coherence tomography. Methods: In this observational study, 25 eyes of 25 healthy adults were examined using the Visante® omni optical coherence tomography system. Central corneal thickness, anterior chamber depth, central lens thickness, and anterior segment length were assessed. The evaluated parameters were obtained with accommodation using different stimulus vergences, namely 0.0, -1.0, -2.0, and -3.0 D. Variation of these parameters was compared among different levels of accommodation. Results: Central corneal thickness was not altered at any s…
Effect of age in the ciliary muscle during accommodation: Sectorial analysis
2017
Abstract Purpose To compare changes in the ciliary muscle area at different sectors between pre-presbyopic and presbyopic eyes during accommodation by means of an anterior segment optical coherence tomographer (OCT). Methods The anterior ciliary muscle area was measured in 20 healthy and phakic pre-presbyopic eyes, whose mean age was 23.3 ± 4.4 years, and in 20 healthy and phakic presbyopic eyes, whose mean age was 46.5 ± 5.2 years. The relative change in the cross-sectional area of the ciliary muscle was measured at the nasal, inferior, and temporal sectors between 0 and −3 D of vergence, in −1 D step. A linear model was used to assess the correlation of each eye parameter with the accommo…