Planimetric optic disc parameters in normal eyes: a population-based study in South India
<b>Purpose:</b> To study the optic disc parameters of normal eyes in a population-based south Indian study. <b>Methods:</b> One hundred and fifty three subjects from a population-based sample of 1060 included in the Andhra Pradesh Eye Disease Survey (APEDS) were enrolled in t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2001-01-01
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| Series: | Indian Journal of Ophthalmology |
| Subjects: | |
| Online Access: | http://www.ijo.in/article.asp?issn=0301-4738;year=2001;volume=49;issue=1;spage=19;epage=23;aulast=Sekhar |
| _version_ | 1818128639984664576 |
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| author | Sekhar G Prasad Kalyani Dandona Rakhi John Rajesh Dandona Lalit |
| author_facet | Sekhar G Prasad Kalyani Dandona Rakhi John Rajesh Dandona Lalit |
| author_sort | Sekhar G |
| collection | DOAJ |
| description | <b>Purpose:</b> To study the optic disc parameters of normal eyes in a population-based south Indian study. <b>Methods:</b> One hundred and fifty three subjects from a population-based sample of 1060 included in the Andhra Pradesh Eye Disease Survey (APEDS) were enrolled in the optic disc study. The male-female ratio, the refractive error and distribution of other ocular parameters in the disc study subjects and the APEDS were not significantly different. Magnification corrected morphometry of optic disc photographs obtained by Zeiss telocentric fundus camera was carried out in one randomly chosen eye of each of these 143 subjects. <b>Results:</b> The mean optic disc parameters with the 95% confidence intervals for the distribution were: disc area 3.37 mm<sup>2</sup> (2.04 - 4.7), vertical disc diameter 2.12 mm (1.67 - 2.57), vertical cup to disc ratio 0.37 (0.19 -0.55) and neuroretinal rim area 2.8 mm<sup>2</sup> (1.76 - 3.84). The disc area, the vertical cup to disc ratio and the rim area showed a normal distribution. The cup to disc ratio correlated with the vertical disc diameter but the association was not strong. <b>Conclusion</b>: The disc area, the vertical cup to disc ratio and the neuroretinal rim area are normally distributed in the South Indian population. The normal optic disc parameters would form a basis for future comparisons in different forms of glaucoma. |
| first_indexed | 2024-12-11T07:36:27Z |
| format | Article |
| id | doaj.art-f10fc094edff41af9c22441296f10094 |
| institution | Directory Open Access Journal |
| issn | 0301-4738 |
| language | English |
| last_indexed | 2024-12-11T07:36:27Z |
| publishDate | 2001-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Indian Journal of Ophthalmology |
| spelling | doaj.art-f10fc094edff41af9c22441296f100942022-12-22T01:15:41ZengWolters Kluwer Medknow PublicationsIndian Journal of Ophthalmology0301-47382001-01-014911923Planimetric optic disc parameters in normal eyes: a population-based study in South IndiaSekhar GPrasad KalyaniDandona RakhiJohn RajeshDandona Lalit<b>Purpose:</b> To study the optic disc parameters of normal eyes in a population-based south Indian study. <b>Methods:</b> One hundred and fifty three subjects from a population-based sample of 1060 included in the Andhra Pradesh Eye Disease Survey (APEDS) were enrolled in the optic disc study. The male-female ratio, the refractive error and distribution of other ocular parameters in the disc study subjects and the APEDS were not significantly different. Magnification corrected morphometry of optic disc photographs obtained by Zeiss telocentric fundus camera was carried out in one randomly chosen eye of each of these 143 subjects. <b>Results:</b> The mean optic disc parameters with the 95% confidence intervals for the distribution were: disc area 3.37 mm<sup>2</sup> (2.04 - 4.7), vertical disc diameter 2.12 mm (1.67 - 2.57), vertical cup to disc ratio 0.37 (0.19 -0.55) and neuroretinal rim area 2.8 mm<sup>2</sup> (1.76 - 3.84). The disc area, the vertical cup to disc ratio and the rim area showed a normal distribution. The cup to disc ratio correlated with the vertical disc diameter but the association was not strong. <b>Conclusion</b>: The disc area, the vertical cup to disc ratio and the neuroretinal rim area are normally distributed in the South Indian population. The normal optic disc parameters would form a basis for future comparisons in different forms of glaucoma.http://www.ijo.in/article.asp?issn=0301-4738;year=2001;volume=49;issue=1;spage=19;epage=23;aulast=SekharOptic discsizeplanimetrycup to disc ratio |
| spellingShingle | Sekhar G Prasad Kalyani Dandona Rakhi John Rajesh Dandona Lalit Planimetric optic disc parameters in normal eyes: a population-based study in South India Indian Journal of Ophthalmology Optic disc size planimetry cup to disc ratio |
| title | Planimetric optic disc parameters in normal eyes: a population-based study in South India |
| title_full | Planimetric optic disc parameters in normal eyes: a population-based study in South India |
| title_fullStr | Planimetric optic disc parameters in normal eyes: a population-based study in South India |
| title_full_unstemmed | Planimetric optic disc parameters in normal eyes: a population-based study in South India |
| title_short | Planimetric optic disc parameters in normal eyes: a population-based study in South India |
| title_sort | planimetric optic disc parameters in normal eyes a population based study in south india |
| topic | Optic disc size planimetry cup to disc ratio |
| url | http://www.ijo.in/article.asp?issn=0301-4738;year=2001;volume=49;issue=1;spage=19;epage=23;aulast=Sekhar |
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