Publications by authors named "Euna B Koo"

Article Synopsis
  • The study investigates whether using postoperative topical antibiotics reduces the risk of surgical site infections in strabismus surgery.
  • The research analyzed data from over 84,000 patients, comparing those who received antibiotics with those who did not, finding no significant difference in infection rates (endophthalmitis, orbital, and preseptal cellulitis).
  • The conclusion suggests that prescribing these antibiotics may be unnecessary, as they did not improve outcomes and raised concerns about costs and antibiotic resistance.
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Purpose: To evaluate the risk of diabetic retinopathy progression and systemic vascular events, including death, in patients with nonproliferative diabetic retinopathy (NPDR) with obstructive sleep apnea (OSA).

Design: Retrospective cohort study.

Methods: Electronic chart query using TriNetX, an electronic health records network comprising data from over 124 million patients.

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Mitochondria-related neurodegenerative diseases have been implicated in the disruption of primary cilia function. Mutation in an intrinsic mitochondrial complex I component NDUFAF2 has been identified in Leigh syndrome, a severe inherited mitochondriopathy. Mutations in ARMC9, which encodes a basal body protein, cause Joubert syndrome, a ciliopathy with defects in the brain, kidney, and eye.

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Purpose: To evaluate associations between ocular manifestations of Marfan syndrome and cardiovascular complications.

Design: Retrospective cohort study.

Methods: The TriNetX Analytics platform, a federated health research network of aggregated deidentified electronic health record data of more than 119 million patients, was used to identify patients diagnosed with Marfan syndrome.

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Antielevation syndrome is commonly described following anteriorization of the inferior oblique muscle. A similar phenomenon may occur following inferior oblique muscle recession, creating a distinct strabismus pattern in the setting of cranial trochlear nerve palsy. We report 3 adult patients, 69-72 years of age, who presented at the Stanford Byers Eye Institute with a similar strabismus pattern-limited elevation in abduction following previous inferior oblique muscle recession for congenital/long-standing trochlear nerve palsy.

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Vernal keratoconjunctivitis (VKC) is a chronic, progressive, and potentially sight-threatening form of ocular inflammatory disease that primarily affects children and young adults. Prevalence varies by region, ranging from <2 per 10,000 in the United States to as high as 1,100 per 10,000 in parts of Africa. The rarity of VKC in developed countries can make differential diagnosis challenging, and treatment is often delayed until the disease is advanced, and symptoms are significantly impacting patients' quality of life.

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Well-known risk factors for anterior segment ischemia (ASI) following strabismus surgery include ipsilateral surgery on three or more rectus muscles, older age, and vasculopathy. ASI is rarely reported in young patients following uneventful strabismus surgery on two ipsilateral rectus muscles. We report a 30-year-old transgender female on long-term estrogen therapy who underwent strabismus surgery involving recessions of both lateral rectus muscles, the right inferior rectus muscle, and the left superior rectus muscle.

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Purpose: To characterize the demographics, eye-related comorbidities, clinical characteristics, clinical outcomes, type of amblyopia tests used, and treatment patterns of a large cohort of pediatric, teenage, and adult amblyopic patients from the IRIS (Intelligent Research in Sight) Registry.

Methods: In this retrospective electronic health record analysis, we analyzed 456,818 patients, of whom 197,583 (43.3%) were pediatric patients; 65,308 (14.

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Article Synopsis
  • The study aims to identify delays in diagnosing and treating retinal detachments (RDs) in children based on retrospective analysis of insurance claims data from 2007 to 2016.
  • It found that many pediatric patients, particularly those without prior eye-related visits, faced significant delays in diagnosis and treatment, with only 40% having any preceding eye-related visits.
  • The results showed that children with pre-existing ocular conditions had quicker diagnoses and repairs, highlighting the importance of previous eye care in preventing delays for RD management.
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Article Synopsis
  • The study aimed to determine how common cytomegalovirus (CMV) ocular disease is in children and identify risk factors related to it.
  • Conducted at four pediatric centers between 2005 and 2018, the research found that 37% of hospitalized children with CMV viremia underwent eye exams, primarily for baseline screening.
  • Out of 296 examined, 13 cases of CMV ocular disease were identified, notably mostly occurring in children who had undergone stem cell transplantation, suggesting the condition is rare but important to monitor in specific patient groups.
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Background: Delayed treatment of congenital or infantile cataracts can cause deprivation amblyopia. Prompt diagnosis and surgical intervention is critical for optimal outcomes. This study assessed referral patterns for congenital or infantile cataracts in two regions of the United States.

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Article Synopsis
  • * A total of 1,766 public posts were analyzed, revealing that 50% were created by vision therapy clinics or therapists, with minimal participation from physicians (0.8%).
  • * The findings showed that most posts were self-promotional, highlighting a lack of engagement from ophthalmologists on social media, but still offering a support avenue for patients and parents.
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Purpose: The aim of this study was to assess the effect of corneal crosslinking on vision and keratometry in children and young adults with progressive keratoconus.

Methods: A retrospective medical records review of patients aged 22 years or younger with keratoconus who underwent corneal crosslinking between January 2013 and November 2019 at Byers Eye Institute at Stanford University was conducted. Outcome measures included logarithm of the Minimum Angle of Resolution corrected distance visual acuity (CDVA); keratometry, including maximum keratometry (Kmax); pachymetry; and total wavefront aberration.

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Objective: To evaluate the relationship between prenatal and postnatal inflammation-related risk factors and severe retinopathy of prematurity (ROP).

Study Design: The study included infants born <30 weeks in California from 2007 to 2011. Multivariable log-binomial regression was used to assess the association between prenatal and postnatal inflammation-related exposures and severe ROP, defined as stage 3-5 or surgery for ROP.

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Joubert syndrome is a group of rare disorders that stem from defects in a sensory organelle, the primary cilia. Affected patients often present with disorders involving multiple organ systems, including the brain, eyes, and kidneys. Common symptoms include breathing abnormalities, mental developmental delays, loss of voluntary muscle coordination, and abnormal eye movements, with a diagnostic "molar tooth" sign observed by magnetic resonance imaging (MRI) of the midbrain.

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Objectives: Surveys are an important tool to assess the impact of research on physicians' approach to patient care. This survey was conducted to assess current practice patterns in the management of infantile cataracts in light of the findings of the Infant Aphakia Treatment Study.

Methods: Pediatric ophthalmologists were emailed a link to the survey using newsletters from American Association of Pediatric Ophthalmology and Strabismus, World Society of Pediatric Ophthalmology and Strabismus, and the Pediatric Listserv.

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Purpose: Amblyopia is a leading cause of low vision and warrants timely management during childhood. We performed a literature review of the management of amblyopia and potential risk factors for amblyopia.

Methods: Literature review of the management of amblyopia and risk factors for amblyopia.

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Acute acquired comitant esotropia (AACE) is characterized by a sudden-onset eye misalignment with an equal angle of deviation in all fields of gaze. This form of esotropia is distinct from common forms of childhood esotropia, such as infantile esotropia and accommodative esotropia, in the rapid tempo and typically later timing of onset; further, AACE is distinct from restrictive or paretic strabismus, which usually results in an incomitant angle of deviation that varies with the direction of gaze. The underlying etiologies for AACE are broad but, in some cases, it may be associated with significant neurologic disease.

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The etiology of corneal decompensation after aqueous shunt implantation remains poorly understood. With the use of anterior segment optical coherence tomography and specular microscopy, the relationship of these implants to the surrounding tissues can be investigated over time. This article will review the current knowledge pertaining to endothelial cell loss related to glaucoma and surgery and highlight possible causes that have been proposed for endothelial cell loss after aqueous shunt implantation.

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Purpose: The aim of this study was to assess the effect of various tube parameters on corneal endothelial cell density (ECD) after insertion of Ahmed valves.

Methods: Thirty-nine eyes of 33 patients with previous superotemporal (ST) Ahmed valve implantation and 20 eyes of 13 participants with previous uncomplicated phacoemulsification and intraocular lens implantation but no history of glaucoma surgery were evaluated. Various tube parameters were measured with anterior segment optical coherence tomography.

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Purpose Of Review: To review emerging indications for the Boston keratoprosthesis (KPro) and to discuss current research underway to improve clinical outcomes.

Recent Findings: In addition to multiple failed corneal grafts, other ocular conditions for which the Boston KPro has been used include herpetic keratitis, aniridia, autoimmune ocular disorders, and pediatric corneal opacities. In the recent years, the KPro has been implanted for various other conditions and has also been explored as a cost-effective treatment for severe corneal diseases internationally.

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