Pterygium in an aged Mongolian population: a population-based study in China

Lü, Jiaju; Wang, Z; Lü, Peng; Chen, Xiao Li; Zhang, W; Shi, Kunchong; Kong, Ying; Ke, Limujiang; R, Chen

doi:10.1038/sj.eye.6703005

Cited by 48 publications

(36 citation statements)

References 28 publications

(39 reference statements)

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“…These results are similar to those by other studies, and most of them confirm that there is a correlation between pterygium and age. [4][5][6][11][12][13][15][16][17] In this study, we found that a VA worse than 20/40 in the better eye is five times more likely among people with pterygium, and although this factor has been assessed in a limited number of studies, they support our findings. This can be due to a change in the convexity of the cornea and development of astigmatism.…”

Section: Discussionsupporting

confidence: 82%

“…4,6,12,16 There are also reports indicating higher prevalence rates among women, 5,13 and yet some studies found no correlation between pterygium and gender (Table 4). 11,15,17,18 On the basis of the results of this study, the prevalence of pterygium significantly increases with age in both genders. These results are similar to those by other studies, and most of them confirm that there is a correlation between pterygium and age.…”

Section: Discussionmentioning

confidence: 61%

“…Some reports indicate that pterygium prevalence rates are lower than 2.0% where Compared to almost all other studies, the prevalence of pinguecula is relatively low in Tehran, and the only report indicating similar results concerns a study in Australia with a prevalence of 1.2% in Melbourne. 4 In contrast to the studies in Tehran and Melbourne, higher prevalence rates have been reported in other populations; 6,7,[11][12][13][14][15][16][17] even as high as 33.1 and 23% in China and Carolina, respectively (Table 4). 5,14 In this study, the prevalence of pterygium according to gender was higher in men only in the 20-to 39-year-old age group, and no significant correlation was seen between pterygium and gender in other age groups.…”

Section: Discussionmentioning

confidence: 72%

“…This can be due to a change in the convexity of the cornea and development of astigmatism. 5,11 The prevalence of pinguecula in this study was 22.0%. Studies concerning this issue are rare, and compared to these studies that report prevalence rates as high as 70%, the prevalence in Tehran is relatively low.…”

Section: Discussionmentioning

confidence: 87%

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Prevalence and risk factors of pterygium and pinguecula: the Tehran Eye Study

Fotouhi

Hashemi

Khabazkhoob

et al. 2008

Eye

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Purpose To determine the prevalence and causes of pterygium and pinguecula in the population of Tehran in 2002. Methods In a cross-sectional population study with cluster sampling, 6497 residents of Tehran were selected from 160 clusters. Samples were chosen according to a door-todoor head counting and were then invited for free examinations. After the interview, ophthalmic examinations were performed at an eye clinic. Results Of the selected sample, 4564 people (70.3%) participated in the study. The age-and gender-standardized prevalence of pterygium in this population was 1.3% (95% confidence interval (CI): 0.9-1.6%). The prevalence of pterygium was 1.4 and 1.1% in men and women, respectively (P40.05). The prevalence of pinguecula in this study was 22.5% (95% CI: 21.1-24.0%); 27.1% in men and 17.7% in women (Po0.001). In both genders, the prevalence of pterygium and pinguecula showed a significant increase with age (Po0.001). Conclusions This study concerns the status of pterygium and pinguecula according to age and gender in the population of Tehran. The overall prevalence rates were 1.3 and 22.5% for pterygium and pinguecula, respectively. The comparison of the results with those reported from other areas of the world suggests lower prevalence rates in Tehran.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 87%

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Prevalence and risk factors of pterygium and pinguecula: the Tehran Eye Study

Fotouhi

Hashemi

Khabazkhoob

et al. 2008

Eye

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“…29 Lu J et al had found a positive association between pterygium and dry eye symptoms. 25 Anguria P et al had found no association between unstable tear film (dry eye) and pterygium. 26 Moreno JC et al found that Schirmer's test and TBUT value were significantly reduced in the eyes with pterygium and significant clinical correlation exists between pterygium and dry eye.…”

Section: Clinical Correlation Of Dry Eye and Pterygiummentioning

confidence: 99%

Clinical correlation between dry eye and pterygium: a study done at government medical college Jammu, Jammu and Kashmir, North India

Manhas

Gupta

et al. 2017

Int J Res Med Sci

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Background: To study the prevalence of dry eye among the patients of pterygium and to find the clinical correlation between dry eye and pterygium.Methods: The study was conducted at postgraduate department of Ophthalmology of GMC Jammu over a period of one year. 90 pterygium patients and 180 age and sex matched controls presenting to the eye OPD of GMC Jammu were included in the study. The TBUT, Schirmer’s test, basal tear secretion and Rose Bengal staining score were estimated in all patients. A TBUT of less than 10 seconds, a Schirmer’s test of less than 10mm, basal tear secretion of less than 10mm, Rose Bengal staining score of more than 3 were considered abnormal.Results: Redness 57 (63.33%) was the most frequently occurring symptom in pterygium patients followed by cosmosis 49 (54.44%). The mean TBUT, mean Schirmer’s, mean basal secretion and mean Rose Bengal staining score values were 9.88±3.39 seconds, 13.17±4.57mm, 10.11±4.81mm and 3.27±1.85 in pterygium patients and 14.22±3.99 seconds, 16.40±5.21mm, 12.19±5.05mm and 2.49±1.86 in the control group respectively. There was a statistically significant difference in the dry eye results between the pterygium patients and control groups (p<0.001). The odd’s ratio between dry eye and pterygium was 3.83, dry eye was present in 53 pterygium patients.Conclusions: The prevalence of dry eye in pterygium patients was 58.89% which suggests that there is a strong positive clinical correlation between dry eye and pterygium.

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Solar Exposure and Residential Geographic History in Relation to Exfoliation Syndrome in the United States and Israel

et al. 2014

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IMPORTANCE Residential (geographic) history and extent of solar exposure may be important risk factors for exfoliation syndrome (XFS) but, to our knowledge, detailed lifetime solar exposure has not been previously evaluated in XFS.OBJECTIVE To assess the relation between residential history, solar exposure, and XFS. DESIGN, SETTING, AND PARTICIPANTSThis clinic-based case-control study was conducted in the United States and Israel. It involved XFS cases and control individuals (all Ն60-year-old white individuals) enrolled from 2010 to 2012 (United States: 118 cases and 106 control participants; Israel: 67 cases and 72 control participants). MAIN OUTCOMES AND MEASURESWeighted lifetime average latitude of residence and average number of hours per week spent outdoors as determined by validated questionnaires. RESULTSIn multivariable analyses, each degree of weighted lifetime average residential latitude away from the equator was associated with 11% increased odds of XFS (pooled odds ratio [OR], 1.11; 95% CI, 1.05-1.17; P < .001). Furthermore, every hour per week spent outdoors during the summer, averaged over a lifetime, was associated with 4% increased odds of XFS (pooled OR, 1.04; 95% CI, 1.00-1.07; P = .03). For every 1% of average lifetime summer time between 10 AM and 4 PM that sunglasses were worn, the odds of XFS decreased by 2% (OR, 0.98; 95% CI, 0.97-0.99; P < .001) in the United States but not in Israel (OR, 1.00; 95% CI, 0.99-1.01; P = .92; P for heterogeneity = .005). In the United States, after controlling for important environmental covariates, history of work over water or snow was associated with increased odds of XFS (OR, 3.86; 95% CI,); in Israel, there were too few people with such history for analysis. We did not identify an association between brimmed hat wear and XFS (P > .57). CONCLUSIONS AND RELEVANCELifetime outdoor activities may contribute to XFS. The association with work over snow or water and the lack of association with brimmed hat wear suggests that ocular exposure to light from reflective surfaces may be an important type of exposure in XFS etiology.

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Pterygium in an aged Mongolian population: a population-based study in China

Cited by 48 publications

References 28 publications

Prevalence and risk factors of pterygium and pinguecula: the Tehran Eye Study

Prevalence and risk factors of pterygium and pinguecula: the Tehran Eye Study

Clinical correlation between dry eye and pterygium: a study done at government medical college Jammu, Jammu and Kashmir, North India

Solar Exposure and Residential Geographic History in Relation to Exfoliation Syndrome in the United States and Israel

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