The epidemiology of age related eye diseases in Asia

Ty, Wong; Sc, Loon; Sm, Saw

doi:10.1136/bjo.2005.083733

Cited by 276 publications

(184 citation statements)

References 77 publications

(72 reference statements)

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“…Recent studies reported that in Asia myopia rates varied widely between urban and rural populations. 15,16 In Taiwan, compared with schoolchildren living in towns or villages, those living in cities had much higher myopic refraction. 3 Consistently, our study showed that degrees of urbanization were strongly associated with myopia, particularly in the age groups of 20-39 and 40-64 years.…”

Section: Discussionmentioning

confidence: 99%

Self-reported myopia in Taiwan: 2005 Taiwan National Health Interview Survey

Guo

et al. 2012

Eye

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Purpose To determine the prevalence of selfreported myopia nationwide in Taiwan and its association with degrees of urbanization and education levels. Methods Data were obtained from the 2005 Taiwan National Health Interview Survey, a nationwide survey using multistage stratified systematic sampling. The presence of myopia, current residential areas, and education levels were ascertained by a structured questionnaire in participants Z12 years of age. Results A total of 20 609 eligible persons were included in this study. The overall weighted prevalence of myopia in Taiwan was 46.7% (95% confidence interval: 45.9, 47.5%). The prevalence of myopia for persons aged 12-19, 20-39, 40-64, and Z65 years was 70.3%, 65.4%, 30.4%, and 5.6%, respectively. Women had significantly higher rates of myopia than men for persons younger than 40 years of age (Po0.001). Myopia was significantly associated with both higher degrees of urbanization of current residential areas and higher education levels (both Po0.001). In young adult and adult groups, the effect of education levels on myopia was stronger than that of degrees of urbanization. Conclusion The study provides a nationwide prevalence data on myopia in Taiwan. Both degrees of urbanization and education levels are risk factors for myopia.

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Section: Discussionmentioning

confidence: 99%

Self-reported myopia in Taiwan: 2005 Taiwan National Health Interview Survey

Guo

et al. 2012

Eye

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“…In [9], histogram based analysis of the color pixel intensity together with multiple method fusion are also employed to further improve cup detection accuracy. Table 1 compares our method to these two level-set approaches 1 .…”

Section: Comparison With Level-set Based Segmentation [6][9]mentioning

confidence: 99%

“…Glaucoma affects about 60 million people [1] and is responsible for approximately 5.2 million cases of blindness (15% of world total) [2]. It unfortunately cannot be cured because the damage to the optic nerve cannot be reversed.…”

Section: Introductionmentioning

confidence: 99%

Sliding Window and Regression Based Cup Detection in Digital Fundus Images for Glaucoma Diagnosis

Lin

et al. 2011

Lecture Notes in Computer Science

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Abstract. We propose a machine learning framework based on sliding windows for glaucoma diagnosis. In digital fundus photographs, our method automatically localizes the optic cup, which is the primary structural image cue for clinically identifying glaucoma. This localization uses a bundle of sliding windows of different sizes to obtain cup candidates in each disc image, then extracts from each sliding window a new histogram based feature that is learned using a group sparsity constraint. An -SVR (support vector regression) model based on non-linear radial basis function (RBF) kernels is used to rank each candidate, and final decisions are made with a non-maximal suppression (NMS) method. Tested on the large ORIGA −light clinical dataset, the proposed method achieves a 73.2% overlap ratio with manually-labeled ground-truth and a 0.091 absolute cup-to-disc ratio (CDR) error, a simple yet widely used diagnostic measure. The high accuracy of this framework on images from low-cost and widespread digital fundus cameras indicates much promise for developing practical automated/assisted glaucoma diagnosis systems.

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“…34 In recent years, there have been several well-conducted studies on the epidemiology of glaucoma in Asian people indicating that the prevalence of glaucoma ranges from 2.1% to 5.0%. 35 Inferring from these data, it is estimated that approximately 1.05% to 2.5% of the population has undetected glaucoma. This small number of patients with undetected glaucoma would be categorized as nonglaucoma and would have a small chance of being selected as part of the comparison cohort.…”

Section: Ho Et Al Open-angle Glaucoma and Strokementioning

confidence: 99%

Open-Angle Glaucoma and the Risk of Stroke Development

Lin

2009

Stroke

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Background and Purpose-Although open-angle glaucoma (OAG) is associated with some of the risk factors of stroke development, there is still no published study addressing whether OAG increases the risk of stroke development. We investigated the risk of stroke development after a diagnosis of OAG. Methods-Data were retrospectively collected from the Taiwan National Health Insurance Research Database, which is comprised of 1 073 891 random subjects from among Taiwan's 23 million residents. The study cohort comprised all patients with a diagnosis of OAG (International Classification of Diseases, 9th Revision, Clinical Modification code 365.1 to 365.11) in 2001 (nϭ4032). The comparison cohort was comprised of randomly selected patients (5 for every patient with OAG, nϭ20 160) matched with the study group in terms of age, gender, geographic location, and comorbid medical disorders. Patients were tracked from their index visits for 5 years. Cox proportional hazard regression was used to compute the 5-year stroke-free survival rate after adjusting for possible confounding factors. Results-Stroke developed in 14.9% of patients with OAG and 9.5% of patients in the comparison cohort during the 5-year follow-up period. Patients with OAG had significantly lower 5-year stroke-free survival rates than patients in the comparison cohort. After adjusting for patients' demographic characteristics and selected comorbidities, patients with OAG were found to have a 1.52-fold (95% CI, 1.40 to 1.72) higher risk of having a stroke than the matched comparison cohort. Conclusions-Patients

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The epidemiology of age related eye diseases in Asia

Cited by 276 publications

References 77 publications

Self-reported myopia in Taiwan: 2005 Taiwan National Health Interview Survey

Self-reported myopia in Taiwan: 2005 Taiwan National Health Interview Survey

Sliding Window and Regression Based Cup Detection in Digital Fundus Images for Glaucoma Diagnosis

Open-Angle Glaucoma and the Risk of Stroke Development

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