Prevalence and Associated Factors of Pinguecula in a Rural Population in Shanghai, Eastern China

Le, Qihua; Xiang, Jun; Cui, Xinhan; Zhou, Xiaodong; Xu, Jianjiang

doi:10.3109/09286586.2015.1012269

Cited by 13 publications

(21 citation statements)

References 28 publications

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“…Participants who have outer occupational activity were also found to have a higher prevalence. These results are supporting the previous studies which supported the association between UV exposure and pinguecula formation [9][10][11][16][17][18][19][20].…”

Section: Discussionsupporting

confidence: 92%

“…In agreement with previous studies, we thought that the reason for decreased pinguecula prevalence after 6 th decade is due to possible progression of pinguecula to pterygium. Rural residence has been shown to be strongly associated with the development of pinguecula [11,16], since residents living in rural areas mainly undertake outdoor occupational activities, meaning far more sunlight exposure. UV radiation cause ocular surface irregularities by increasing the level of p53, proinflamatuar cytokines and matrix metalloproteinase [17].…”

Section: Discussionmentioning

confidence: 99%

“…Indoor workers were those who spent most of the day indoors such as office, hospital. Participants were also divided into two groups according to whether the exposure to daily sunlight was more than 2 hours [16]. The level of education was categorized into the stages of illiterate, primary school education, high school education and university.…”

Section: Methodsmentioning

confidence: 99%

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Batı Türkiye'de pinguecula prevalansı ve ilişkili faktörler

Dündar¹,

Kocasaraç²

2020

Pamukkale Medical Journal

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This study aimed to describe the prevalence and factors associated with pinguecula in the western part of Turkey. Materials and methods: The study included 1443 participants over the age of 20 between January 2018 and October 2019. The presence of pinguecula on slit lamp examination was recorded. A structured questionnaire which includes basic demographic data, occupational activity, educational level, alcohol consumption and smoking, dry eye questionnaire and systemic disorders such as diabetes or hypertension was applied. Results: The prevalence of pinguecula was 52.5%. Pinguecula prevalence was higher in males (58.4%) than females (46.8%). The prevalence of pinguecula significantly increased with age (p<0.001). Outdoor working, more than 2 hours of sun exposure and decreased tear break-up time (TBUT) values increase the prevalence rate of pinguecula. The pinguecula prevalence decreases as the level of education increases. Conclusion: The prevelance of pinguecula was detected in 52.5% of the population aged ≥20 years and this is the first study which investigates the prevalence of pinguecula in Turkey. Age, gender, duration of sun exposure, TBUT values and education level are found to be related to the pinguecula prevalence. We also found that pinguecula causes lower TBUT scores due to instability of tear film despite normal tear film secretion and volume.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

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Batı Türkiye'de pinguecula prevalansı ve ilişkili faktörler

Dündar¹,

Kocasaraç²

2020

Pamukkale Medical Journal

View full text Add to dashboard Cite

show abstract

“…It is believed that pinguecula, fibro-fatty lesion of the conjunctiva, is also connected with UVR exposure, however, the correlation is weaker than in the case of pterygium. A study on Chinese population (959 people) [20] and Indian population (7774 people) [21] stated that working outside and a bigger exposure to sunlight during lifetime were risk factors of pinguecula.…”

Section: Influence On Conjunctiva and Corneamentioning

confidence: 99%

Adverse effect of UV radiation on eyes — a review

et al. 2018

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The aim of this study is to discuss the association between ultraviolet radiation (UVR) and eye diseases. UVR which reaches the surface of the Earth consists of 95% UVA and 5% of UVB. Both acute and chronic exposure to UVR leads to pathological changes in the eye. There is strong evidence that UVR exposure causes photokeratitis, photoretinitis, climatic droplet keratopathy, cataract, pterygium, squamous cell carcinoma of cornea and conjunctiva, cancer of the eyelids (squamous cell and basal cell carcinoma). Association between UVR and pinguecula, AMD (age-related macular degeneration) and melanoma of the eyeball is ambiguous. UVR exposure occurs all day and all year long, which is why eye protection is necessary to avoid diseases induced by UVR. In particular childrens' eyes should be protected from the sun. Efficient protection is provided by accurate clothing, hats, eyeglasses or contact lenses blocking UV light.

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“…This noncancerous tissue commonly grows from the nasal and is in a wing-shaped [2]. In addition, pinguecula, another eye disorder, is a benign thin layer of fleshy tissue that appears as a yellow spot that grows on the conjunctiva [3]. However, these tissues do not grow towards the cornea region in contrast to the pterygium.…”

Section: Introductionmentioning

confidence: 99%

Mobile Screening Framework of Anterior Segment Photographed Images

Zamani

Ramlan

Zaki³

et al. 2018

IJET

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This work presents a qualitative measurement of anterior segment photographed images (ASPIs) to identify between normal eyes and eyes with pterygium and pinguecula through Otsu multi-thresholding approach without contrast enhancement. In addition, we also propose a mobile screening framework of ASPIs through smartphones. ASPIs were directly sent to the cloud storage once an ASPI was captured using a smartphone camera, and then each image was processed through a digital image processing approach in a processing platform. Three important steps, namely, pre-processing, image segmentation and qualitative assessment, are involved in the processing platform of the mobile screening framework. The ASPIs are pre-processed to minimise or eliminate any unwanted areas within the image. Then, these ASPIs are segmented through multi-thresholding Otsu approach with clustering number n = 3. Segmentation result shows that the accuracy of the proposed method is 87.5%, which is comparable with the previously established work that has applied three-step differencing (3SD) method. However, the proposed approach has better computational time which is six times faster than the 3SD method. These results demonstrate a remarkable effort to produce a simple but straightforward digital image processing approach to be implemented in cloud computing for future studies.

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Prevalence and Associated Factors of Pinguecula in a Rural Population in Shanghai, Eastern China

Abstract: The prevalence of pinguecula was 75.57% in this Chinese population aged ≥ 50 years from a coastal rural area of Shanghai, Eastern China, which was higher than the majority of previous findings. Age and working outdoors were independent risk factors for pinguecula.

Cited by 13 publications

References 28 publications

Batı Türkiye'de pinguecula prevalansı ve ilişkili faktörler

Batı Türkiye'de pinguecula prevalansı ve ilişkili faktörler

Adverse effect of UV radiation on eyes — a review

Mobile Screening Framework of Anterior Segment Photographed Images

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