Purpose: Dermatochalasis is a frequently encountered clinical pathology. The main surgical indications are cosmetic problems and the detrimental effects on the visual field. The frequency of dry eye symptoms in these patients is worthy of attention. In our study we aimed to investigate the effects of dermatochalasis on tear formation and the ocular surface. Material and Method: Patients having no disease which may affect ocular surface were separated into group I with, and group II without dermatochalasis. They were asked about symptoms of dry eye. Following routine examination the presence of blepharitis was recorded. The Schirmer I test, tear break up time (BUT) and cytologic evaluation of the ocular surface by the impression cytology technique were performed. The levator function was measured in all patients. The data obtained was compared statistically. Results: Dry eye symptoms were present in 53.8% of patients in group I and in 38.7% in group II. Blepharitis was found in 28 eyes in group I and in 10 in group II. The average Schirmer test results in groups I and II were 10.37±5.46mm and 8.87±5.22mm, while the BUT values were 6.32±3.09sec and 6.42±5.55 sec, respectively. Comparision of the impression cytology results revealed a striking increase in the degree of squamous metaplasia in the upper quadrant of group I than the lower quadrant (p=0.00). It was demonstrated that squamous metaplasia of the lower quadrant of the ocular surface increased significantly as the degree of dermatochalasia increased. Conclusion: Dermatochalasia may lead to an increase in ocular surface changes and dry eye symptoms. It is therefore not simply a cosmetic problem but a pathology which must be treated.