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       XXIX Annual Congress of the Iranian Society of Ophthalmology        بـیــست و نهمین کنــگــره سـالیـانه انـجـمـن چـشـم پـزشـکی ایـــران
مقاله Abstract

Title: Comparison of Conventional and Pattern Scanning Pan-retinal Photocoagulation on Diabetic Patients' visual field
Author(s): Mohamadreza Niyousha1, Mohamadhosein Ahoor1, Amir Abdollah Eftekhari 1, Sasan Jafari2, Narges Hassanpoor3
Presentation Type: Oral
Subject: Posterior Segment
Presenting Author:
Name: Narges Hassanpoor
Affiliation :(optional) Farabi Eye Hospital
E mail:
Phone: 02155487865
Mobile: 09125709817

to compare visual field defects in two different methods of conventional pan retinal photocoagulation (PRP) and Pattern Scanning PRP in patients with proliferative diabetic or very severe non- proliferative diabetic retinopathy.


Twenty patients with proliferative or very severe non-proliferative diabetic retinopathy were enrolled. Only patients with same severity score in both eyes were included. One eye underwent the Conventional PRP and the other eye Pattern Scanning PRP simultaneously. SITA Standard perimetry was repeated one month after the initial PRP and evaluated for visual field defects.


Pattern standard deviation (PSD) significantly increased in both pattern and conventional PRP groups within one month after PRP. There was no significant difference between the mean PSD values of the two groups before PRP and after one month of the follow-up.The mean deviation (MD) level significantly decreased in the conventional group after 1 month.


Changes in visual acuity and visual field of patients between the two Pattern and conventional PRP methods did not show a significant difference but pattern PRP method causes less reduction of the overall sensitivity in the patient's visual field.


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