2Prof. Dr., Okmeydanı Eğitim ve Araştırma Hastanesi, Göz Hastalıkları Bölümü, İstanbul, Türkiye Purpose: This study was designed to assess the factors affecting the pupillary diameter in patients with diabetic retinopathy.
Materials and Methods: One hundred and eight eyes of fifty-four patients were evaluated cross-sectionally to study the factors affecting the pupillary diameter in diabetic patients. The pupillary diameter was measured using a Pentacam 30 min after the cyclopentolate administration. The severity and duration of diabetes, phakic or intraocular lens status, pan-retinal photocoagulation history, ?1A-blocker use, intravitreal injection, and vitrectomy history were the items included in this study that could affect the pupillary diameter. The visual acuity and intraocular pressure were also assessed.
Results: The outcomes of the present study revealed that the pupillary diameter was smaller in those patients with proliferative retinopathy and long-term diabetes, and that the mean pupillary diameter was also smaller in the intraocular lens implanted patients. In addition, ?1A-blocker use and a vitrectomy surgery history were related to the pupil size. Moreover, pan-retinal photocoagulation and the number of intravitreal injections were insignificantly related to the pupillary diameter.
Conclusion: Among the factors studied, the severity and duration of diabetes were the prominent factors that played important roles in affecting the pupillary diameter in the diabetic patients.
Keywords : Pupillary diameter, diabetes mellitus, retinopathy