方法：采用整群随机抽样的方法，选取4个村，1个社区，40岁及以上户籍人口共3 628人，进行视力检查、眼压检查、裂隙灯检查和问卷调查。

结果：实际受检人数为3 393人，受检率为93.52%。检出翼状胬肉患者843例，翼状胬肉的患病率为24.85%。

结论：东莞地区翼状胬肉患病率较高，翼状胬肉患病率与年龄、工作环境有关，与性别无关。

METHODS: Using the method of cluster random sampling, select 3 628 people aged 40 and above in four villages and one community for visual examination, intraocular pressure check, slit lamp examination and questionnaire.

RESULTS: The actual number of subjects was 3 393 people, and examination rate was 93.52%. We detected 843 patients with pterygium. The prevalence of pterygium was 24.85%.

CONCLUSION: There is high prevalence of pterygium in Dongguan area. The prevalence of pterygium is related with age and working environment, but has no relation with gender.