scholarly journals Effect of High Myopia on Optic Nerve Head by Confocal Scanning Laser Ophthalmoscopy in Nepalese Eyes

2019 ◽  
Vol 33 (2) ◽  
pp. 181
Author(s):  
Sameer Bhaila ◽  
Sagun Narayan Joshi ◽  
Madhu Thapa ◽  
Gauri Shankar Shrestha
Keyword(s):  
Optic Nerve ◽  
Optic Nerve Head ◽  
High Myopia ◽  
Scanning Laser ◽  
Scanning Laser Ophthalmoscopy ◽  
Confocal Scanning Laser Ophthalmoscopy ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

Topographic Differences between Large and Normal Optic Discs: A Confocal Scanning Laser Ophthalmoscopy Study

2011 ◽  
Vol 22 (1) ◽  
pp. 63-69 ◽  
Author(s):  
Ali Bulent Cankaya ◽  
Tulay Simsek
Keyword(s):  
Regression Analysis ◽  
Optic Nerve ◽  
Optic Nerve Head ◽  
Scanning Laser ◽  
Scanning Laser Ophthalmoscopy ◽  
Height Variation ◽  
Confocal Scanning Laser Ophthalmoscopy ◽  
Disc Area ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

Purpose The aim of the study was to investigate the optic nerve head parameters of healthy macrodiscs to provide standard measurements for them to be the basis for future quantitative comparisons. Methods Sixty-nine subjects with macrodisc (disc area larger than 2.82 mm2) and 91 healthy controls (disc area between 1.16 and 2.82 mm2) were recruited. After a complete ophthalmic examination, confocal scanning laser ophthalmoscopy was performed in all participants. The stereometric parameters of confocal scanning laser ophthalmoscopy examination and the proportion of subjects classified as normal, borderline, and glaucomatous by the Moorfield Regression Analysis were compared between groups. Results A total of 160 subjects were included in the study. The average disc sizes in the control and macrodisc groups were 2.14±0.33 mm2 and 3.36±0.36 mm2, respectively. Cup area (p<0.001), rim area (p=0.01), cup volume (p<0.001), cup/disc area ratio (p<0.001), linear cup/disc ratio (p<0.001), mean cup depth (p<0.001), maximum cup depth (p<0.001), and cup shape measure (p<0.001) differed significantly between the 2 groups. The parameters of the optic nerve head which did not differ significantly between groups were rim volume (p=0.17) and height variation contour (p=0.88). A significantly higher number of eyes were erroneously identified as abnormal (15.1% vs 79.4%) by Moorfield Regression Analysis in the macrodisc group (p<0.001). Conclusions Rim volume and height variation contour were the only optic nerve head topographic parameters that were similar in eyes with large and normal disc sizes. They seem to be promising parameters in the evaluation and comparison of the optic nerve head of subjects with macrodisc.

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