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ORIGINAL ARTICLE
Year : 2018  |  Volume : 19  |  Issue : 3  |  Page : 191-195

Assessment of quality and quantity of vision in astigmatic patients with tilted disc: a comparative study


Department of Ophthalmology, Kasr Alainy Medical School, Faculty of Medicine, Cairo University, Giza, Egypt

Correspondence Address:
Nehal M Samy El Gendy
Kasr Alainy Medical School, Cairo University, 43 Gameat El Dewal El Arabia Street, El Mohandeseen District, Giza 12411
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/DJO.DJO_83_17

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Purpose The purpose of this article was to compare the quality and quantity of vision in cases with corneal astigmatism with and without tilted disc. Patients and methods Cases with astigmatic error between 1 and 3 D with and without tilted disc were included in the present study. Quantity of vision, in the form of uncorrected and corrected distance visual acuities, was compared. Quality of vision questionnaire, designed by McAlinden et al. in 2010, was used, and the results compared between the two groups. Higher order aberrations were also compared. Results Sixty eyes of 60 patients were included (30 eyes in each group). Uncorrected distance visual acuity was significantly lower in tilted disc group (Log MAR: 0.8±0.2) versus 0.5±0.2 in the group without tilted disc (P=0.04). Coma and trefoil values were also significantly higher in tilted disc group (0.4±0.1 vs. 0.2±0.1, P=0.03, respectively, and 0.3±0.1 vs. 0.1±0.1, P=0.04, respectively). Quality of vision test for uncorrected patients showed that patients with tilted disc suffered more from distortion, multiple image formation, and focus difficulty (frequency, severity, and bothersome were all affected) and starbursts (frequency only was affected). With spectacle correction, multiple images and focus difficulty (severity and bothersome) were improved. In addition, starbursts frequency was improved. Conclusion A significant difference in certain aspects of quality and quantity of vision between astigmatic patients with and without tilted disc was shown in this study. This should be put into consideration in certain job applicants and in refractive surgery candidates.


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