Publications by authors named "Claudio I Perez"
Purpose: To evaluate the association of intraoperative and postoperative subconjunctival injections of mitomycin C (MMC) and rate of the hypertensive phase after implantation of the Ahmed glaucoma valve (AGV).
Design: Comparative case series.
Participants: This retrospective comparative study included 37 eyes of 35 patients with uncontrolled glaucoma on maximum tolerated medical therapy who underwent implantation of AGV by a single surgeon.
Purpose: To determine the changes in optical coherence tomography (OCT) color probability codes and diagnostic ability for peripapillary retinal nerve fiber layer (pRNFL) and ganglion cell complex (GCC) analysis after applying Chinese and white subjects normative databases.
Design: Cross-sectional study.
Methods: This study enrolled 219 healthy eyes (108 white and 111 Chinese patients) to construct an ethnicity-specific normative database for pRNFL and macular GCC thickness, which was tested then in 180 eyes with or without glaucoma (102 white and 78 Chinese patients).
Objectives: Assessment of the impact of general anaesthetic agents on intraocular pressure (IOP) in children via systematic review.
Methods: Pubmed, Embase, and CENTRAL databases were systematically searched to identify randomised controlled trials, prospective, and interventional studies. The search included all studies through October 5, 2018 with no date or language restrictions.
Neurotrophic keratitis after micropulse transscleral diode laser cyclophotocoagulation.
Am J Ophthalmol Case Rep
September 2019
Purpose: To report two cases of neurotrophic keratitis (NK) after micropulse transscleral cyclophotocoagulation (MP-TCP).
Observations: Two patients with predisposing factors for decreased corneal sensation developed NK 1 month after MP-TCP. Both patients did not heal with initial treatment with topical antibiotic and preservative free artificial tears.
Purpose: We compare anterior segment characteristics of Filipino- versus Chinese- and Caucasian-Americans to describe the differences in risk factors among each ethnic group.
Methods: A cross-sectional study was conducted among Filipino, Chinese, and Caucasian subjects without glaucoma who underwent a standardized set of ocular examinations and anterior segment optical coherence tomography (Visante ASOCT) imaging. Zhongshan Angle Assessment Program (ZAAP) 4 was used for ASOCT image analysis.
: To evaluate the best formula to predict intraocular pressure (IOP) reduction after cataract surgery. : In this prospective longitudinal study, we included consecutive patients with or without glaucoma, either with open or with narrow angles but without peripheral anterior synechiae, who underwent phacoemulsification. Clinical factors and anterior segment parameters measured with optical biometry and optical coherence tomography were evaluated as preoperative predictors for IOP reduction at 6 months postoperatively.
View Article and Find Full Text PDFPurpose Of Review: Although reducing the intraocular pressure (IOP) through medications, laser or surgery remains the primary means of glaucoma treatment, there is increasing evidence during the last decade that environmentally modifiable factors may help to prevent glaucoma or its progression through different mechanisms that may or may not involve lowering IOP. Additionally, patients are increasingly interested in maintaining a healthy lifestyle and taking an active role in the management of their disease. Therefore, the aim of this review is to summarize the current evidence regarding environmentally modifiable factors such as lifestyle, exercise, and nutrition in the pathogenesis of glaucoma.
View Article and Find Full Text PDFPurpose: This prospective study used anterior segment optical coherence tomography (AS-OCT) to determine how phacoemulsification (phaco) changes iris parameters in eyes with glaucoma or glaucoma suspect status.
Methods: Using Visante AS-OCT (Carl Zeiss Meditec AG), the following pre- and post-phaco parameters were measured: IT750 = iris thickness at 750 μm from the scleral spur; IT2000 = iris thickness 2000 μm from the scleral spur; ITCM = the maximum iris thickness at the middle one third of the iris; ICURV = iris curvature; IAREA = iris area; and pupil size = pupil diameter (mm). Only high-quality images with an identifiable scleral spur were included, and only the nasal quadrant was analyzed.
Purpose: To evaluate the effectiveness of trabecular microbypass stent (iStent) implantation in combined mechanism glaucoma (CMG).
Design: Retrospective cohort study.
Methods: We reviewed the medical charts of patients with the following scenarios: (1) primary open-angle glaucoma (POAG) undergoing phacoemulsification (PE), (2) POAG undergoing PE with iStent (POAG-PE/iStent), (3) CMG undergoing PE (CMG-PE), and (4) CMG undergoing PE with iStent (CMG-PE/iStent).
Purpose: To evaluate the difference in anterior segment optical coherence tomography (AS-OCT) parameters among ethnic Vietnamese, Chinese, and whites.
Design: Cross-sectional study.
Methods: We prospectively recruited phakic nonglaucomatous participants (based on intraocular pressure < 21 mm Hg, normal optic nerve head and retinal nerve fiber, and cup-to-disc ratio < 0.
Purpose: Evaluate the distribution and the color probability codes of the peripapillary retinal nerve fiber layer (RNFL) and macular ganglion cell-inner plexiform layer (GCIPL) thickness in a healthy Vietnamese population and compare them with the original color-codes provided by the Cirrus spectral domain-optical coherence tomography.
Methods: This is a cross-sectional study. We recruited nonglaucomatous Vietnamese subjects and constructed a normative database for peripapillary RNFL and macular GCIPL thickness.
Purpose: To evaluate a novel gonioscopy score as a potential predictor for intraocular pressure (IOP) reduction after cataract surgery.
Materials And Methods: This was a prospective study that included consecutive patients with or without glaucoma, either with open or narrow angles but without peripheral anterior synechiae, who underwent phacoemulsification. Eyes with intraoperative complications and secondary glaucoma were excluded.
Use of Nd:YAG laser to recanalize occluded Cypass Micro-Stent in the early post-operative period.
Am J Ophthalmol Case Rep
June 2018
Purpose: To report the first case of Neodymium Yttrium Aluminum Garnet Nd:YAG) laser use to recanalize a CyPass occluded with a clot in the early postoperative follow-up.
Observations: A 66 year-old woman with primary open angle glaucoma and cataract received combined cataract surgery plus CyPass in the right eye. Surgery was uneventful, however, there was a small amount of hyphema related to bleeding around the site of Cypass insertion.
Purpose: To evaluate anterior segment (AS) parameters obtained by AS OCT within an urban Korean population and to compare them with measurements seen in Chinese and white participants.
Design: Prospective, cross-sectional, clinic-based study.
Participants: Three gender- and age-matched cohorts of Korean, Chinese, and white participants recruited from general ophthalmology clinics in urban academic hospital settings.
Purpose:: The aim of this study was to introduce a reproducible algorithm for the surgical management of late-onset (>2 months) bleb complications after trabeculectomy with mitomycin C.
Methods:: We performed a retrospective review of eyes treated using a reproducible algorithm approach by a single surgeon for the surgical management of late-onset bleb complications from July 2006 to April 2014. Exclusion criteria were bleb revision with less than 3 months of follow-up or bleb revision combined with other glaucoma procedures at the time of surgery.
Purpose Of The Study: The purpose of the study was to report and evaluate outcomes of trabeculectomy with use of a subconjunctival biodegradable collagen matrix implant.
Patients And Methods: Retrospective review of trabeculectomy with Ologen implant of 65 eyes of 58 patients by the same surgeon from October, 2011 to October, 2014. Exclusion criteria were <6 months of follow-up after surgery, and uveitic or neovascular glaucoma.
Purpose: To evaluate postoperative alignment in children with and without Down syndrome after surgical correction of esotropia.
Methods: The medical records of consecutive patients with Down syndrome who underwent corrective surgery for esotropia between August 1992 and July 2012 were retrospectively reviewed. Age range for eligibility was between 8 months and 17 years at surgery.
The purpose of this study was to analyze the levels of white blood cells and profile of proinflammatory Th1, Th2, Th17, and T regulatory tissue cytokines in the tonsils of periodic fever, aphthous stomatitis, pharyngitis, and cervical adenitis (PFAPA) patients to contribute to the pathophysiological understanding of the PFAPA syndrome. A cohort of PFAPA patients who had tonsillectomy during 2010 and 2011 was included and compared to control patients who had tonsillectomy for tonsillar hypertrophy. White blood cell counts were measured during flares in PFAPA patients and before tonsillectomy in the control group.
View Article and Find Full Text PDFBackground: Ingrown toenail is a common disease that causes pain and discomfort. There are conservative and surgical treatments, but many have the drawbacks of recurrence and long recovery time.
Objective: To analyze for the first time the results of a technique called nail splinting using a flexible tube secured using a suture (FTSS) performed on a series of patients with ingrown toenails.