Pterygium is an ocular pathology among workers in Ecuador's agricultural and productive areas. The present study aimed to identify the relationship between the use of agricultural chemicals, sun exposure, and other irritants and the appearance of pterygium in the personnel of the packing area of the San Luis farmof the Panigon enclosure of the province of Los Rios, Ecuador, Colombia. Between April and September 2022. An analytical, descriptive, cross-sectional study was carried out. As a result, it was found that 70% of workers with pterygium are detected, although the company applies biosecurity protocols. It confirms previous studies pointing to chemical exposure and sunlight as the leading causes of pterygium. Implementing visual care practices was reaffirmed, avoiding exposure to chemical factors.