3 results on '"Anna Cheng Sim Tan"'
Search Results
2. The Outcomes of Primary Pediatric Keratoplasty in Singapore
- Author
-
Anna Cheng Sim Tan, Hla Myint Htoon, Jin Rong Low, Arundhati Anshu, and Donald T. Tan
- Subjects
Graft Rejection ,Male ,Keratoconus ,medicine.medical_specialty ,Time Factors ,Adolescent ,genetic structures ,Corneal Diseases ,Corneal Transplantation ,Dysgenesis ,Ophthalmology ,Humans ,Medicine ,Prospective Studies ,Child ,Prospective cohort study ,Corneal Scar ,Survival analysis ,Singapore ,Univariate analysis ,business.industry ,Incidence ,Incidence (epidemiology) ,Graft Survival ,Infant ,Corneal Transplant ,medicine.disease ,eye diseases ,Surgery ,Treatment Outcome ,Child, Preschool ,Female ,sense organs ,business ,Follow-Up Studies - Abstract
Purpose To evaluate the long-term corneal graft survival and risk factors for graft failure in pediatric eyes. Design Retrospective, interventional consecutive case series. Methods Unilateral eyes of 105 patients aged 16 years and below were included from the Singapore Corneal Transplant Study between April 4, 1991 and April 4, 2011. Corneal graft survival was calculated using Kaplan-Meier survival analysis, and survival distributions were compared using log-rank test. Results Mean recipient age was 8.38 ± 5.63 years (range 0.18–15.92 years). Mean follow-up time was 34.16 ± 39.10 months. Main diagnoses were corneal scar (22.9%), limbal dermoid (21.9%), anterior segment dysgenesis (15.2%), and keratoconus (14.3%). Forty-four eyes (41.9%) underwent penetrating keratoplasty (PK), 37 (35.2%) underwent anterior lamellar keratoplasty (ALK), 22 (21.0%) underwent lamellar corneal patch graft, and 2 (1.9%) underwent Descemet stripping automated endothelial keratoplasty (DSAEK). Kaplan-Meier survival rates for PK were 92.8% at 1 year, 88.9% at 2–4 years, and 80.9% at 5–16 years; survival rates for ALK were 88.0% at 1 year and 84.3% at 2–7 years; survival rates for corneal patch graft were 100% at 1–3 years and 90% at 4–10 years; these were not statistically significant ( P = .362). Deep corneal vascularization ( P = .012), preexisting active inflammation ( P = .023), preexisting glaucoma drainage device ( P = .023), and preexisting ocular surface disease ( P = .037) were associated with reduced graft survival in a univariate analysis. Conclusions We report good long-term graft survival following pediatric keratoplasty for various indications. Lamellar keratoplasty, when indicated, should be the procedure of choice in high-risk keratoplasties.
- Published
- 2014
- Full Text
- View/download PDF
3. Choroidal Thickness Changes in Age-Related Macular Degeneration and Polypoidal Choroidal Vasculopathy: A 12-Month Prospective Study
- Author
-
Ranjana Mathur, Chui Ming Gemmy Cheung, Tien Yin Wong, Gavin Tan, Si Rui Ng, Daniel Shu Wei Ting, Shu Pei Tan, Ian Yew San Yeo, Wei Yan Ng, Anna Cheng Sim Tan, and Choi Mun Chan
- Subjects
Male ,Vascular Endothelial Growth Factor A ,0301 basic medicine ,Refractive error ,medicine.medical_specialty ,Visual acuity ,genetic structures ,Bevacizumab ,Visual Acuity ,Angiogenesis Inhibitors ,complex mixtures ,03 medical and health sciences ,Polyps ,0302 clinical medicine ,Risk Factors ,Ophthalmology ,medicine ,Humans ,Prospective Studies ,Fluorescein Angiography ,Prospective cohort study ,Aged ,Aged, 80 and over ,medicine.diagnostic_test ,Choroid ,business.industry ,Middle Aged ,Macular degeneration ,medicine.disease ,Fluorescein angiography ,Choroidal Neovascularization ,eye diseases ,030104 developmental biology ,Choroidal neovascularization ,medicine.anatomical_structure ,Intravitreal Injections ,Wet Macular Degeneration ,030221 ophthalmology & optometry ,Optometry ,Female ,sense organs ,medicine.symptom ,business ,Tomography, Optical Coherence ,Follow-Up Studies ,medicine.drug - Abstract
To describe 12-month changes in choroidal thickness after anti-vascular endothelial growth factor (anti-VEGF) therapy for typical age-related macular degeneration (AMD) and polypoidal choroidal vasculopathy (PCV).Prospective, consecutive, noninterventional, longitudinal case series.This study included patients with typical AMD and PCV who received anti-VEGF therapy over a 12-month period. We used spectral-domain optical coherence tomography with enhanced depth imaging mode to measure choroidal thickness.Of the 163 patients, 77 had typical AMD and 86 had PCV. Patients with PCV were younger (67.6 vs 72.5 years, P.01) and received fewer anti-VEGF injections (3.9 vs 5.6, P = .02) than patients with typical AMD. Baseline subfoveal choroidal thickness was not significantly different between PCV and typical AMD eyes, and was thicker in the study eye compared to fellow eye in the typical AMD group (223.1 vs 208.8 μm, P.01). Subfoveal choroidal thickness decreased significantly in both typical AMD (213.7 μm to 190.3 μm, P.001) and PCV (240.8 μm to 213.4 μm, P.01) eyes, but no significant change was noted in fellow unaffected eyes. Reduction in choroidal thickness was associated with elevated C-reactive protein (odds ratio [OR]: 1.4, P = .04) and smoking (OR: 7.6, P = .03) at baseline, but not with age, refractive error, diagnosis of typical AMD or PCV, number or type of anti-VEGF injections, PDT therapy, or baseline choroidal thickness.A significant reduction in subfoveal choroidal thickness was noted after anti-VEGF therapy in typical AMD and PCV. Choroidal thickness changes were similar despite differences in number of anti-VEGF treatment.
- Published
- 2016
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.