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


Title: Comparison of the visual acuities measured by Bina and Yand digital charts
Author(s): Haleh Kangari, Alireza Akbarzade Bagheban, Mohammad Ghassemi-Broumand, Mohammad Reza Nazari, Atieh Khomamizadeh
Presentation Type: Poster
Subject: Posterior Segment
Others:
Presenting Author:
Name: Haleh Kangari
Affiliation :(optional) Shahid Beheshti University of Medical Sciences
E mail: halehkangari@gmail.com
Phone: 021- 77561723
Mobile: 09128206390
Purpose:

to compare the visual acuity measured by Bina digital Tumbling E chart (made in Iran) with Yang digital chart (made in Italy) in healthy subjects and patients with various eye diseases.

Methods:

This study was carried out on 200 participants (healthy n=40; Glaucoma n=40; retinal disorders, n=40; post-lasik n=40; corneal n=40) at Rasoul Akram hospital. The mean age was 44.28 years. Their BCVA were determined by Tumbling E chart at 4 meters. In each group, half of the subjects were first tested with one chart and the rest were tested with the other chart.

Results:

The mean Log MAR measured by Bina and Yang charts were, 0.277 + 0.012, 0.280 +0.012 respectively. Paired t-test shows no statistically significant difference between two tests (P=0.721). Spearman correlation coefficient, for two tests was 0.947 (P<0.001), indicating a strong positive correlation. Spearman correlation coefficients in different groups were: corneal transplantation (0.967), glaucoma (0.933), retinal disorders (0.923), post-lasik (0.756) and healthy subjects (0.5).

Conclusion:

The two digital Tumbling E acuity chart, act similarly at different levels of acuity in different disorders. A better design of the optotype in the lower lines the Bina chart is recommended.

Attachment: 475bina Yang poster 92.pptx





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  - بـیــست و سومین کنــگــره سـالیـانه انـجـمـن چـشـم پـزشـکی ایـــران