Relationship between optic disc ovality and horizontal disc tilt in normal young subjects

Takasaki, Hiroko; Higashide, Tomomi; Takeda, Hisashi; Ohkubo, Shinji; Sugiyama, Kazuhisa

doi:10.1007/s10384-012-0193-9

Cited by 33 publications

(32 citation statements)

References 16 publications

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“…This finding suggested that the OI, the conventional tilting parameter, mostly represented the slope from superonasally to inferotemporally; however, the OI did not reflect tilting toward other directions, for example, inferonasally to superotemporally. Similar findings have been reported using the HRT3, and one study reported that the OI was correlated significantly with horizontal tilt measured by three-dimensional HRT imaging but not with vertical tilt, 26 which agreed with the current data. The current study also showed that the PTI had the highest correlation with torsion in the superotemporal-inferonasal sectors and superior-interior sectors.…”

Section: Agreement Of Pti With Oi and Degree Of Torsionsupporting

confidence: 92%

“…24 The OI, defined as the shortest/longest axis of the ONH on fundus photographs, is the gold standard to identify this ''obliqueness'' in myopic eyes. However, it was difficult to quantitate the level 25,26 However, issues remain. One is the wide variation in disc sizes in myopic eyes, which must introduce bias into the measurements of the top of the rims and the comparisons of the contour.…”

Section: Rationale Of Disc Tilting and Conventional Parametersmentioning

confidence: 99%

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Analysis of Peripapillary Geometric Characters in High Myopia Using Swept-Source Optical Coherence Tomography

Asai

Ikuno

Kikawa

et al. 2016

Invest. Ophthalmol. Vis. Sci.

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Section: Agreement Of Pti With Oi and Degree Of Torsionsupporting

confidence: 92%

Section: Rationale Of Disc Tilting and Conventional Parametersmentioning

confidence: 99%

Analysis of Peripapillary Geometric Characters in High Myopia Using Swept-Source Optical Coherence Tomography

Asai

Ikuno

Kikawa

et al. 2016

Invest. Ophthalmol. Vis. Sci.

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“…13,19,36,37 Previous studies reported that the optic disc is significantly larger and more oval in myopic eyes comparing with the healthy nonmyopic eyes, and the size and OI of optic disc are correlated with SE 38,39 and AL of the eye. 39 Although the OI is a gold standard for identifying ONH insertion obliqueness in myopic eyes, 23,40 its 2D characteristic does not take original optic disc shape into consideration. 40,41 We did not find evidence for an association between OI and SE (BF: 0.91) in our study and our result was in agreement with Takasaki et al 40 and Asai et al 23 who did not find a significant correlation between SE and OI as well.…”

Section: Discussionmentioning

confidence: 99%

“…39 Although the OI is a gold standard for identifying ONH insertion obliqueness in myopic eyes, 23,40 its 2D characteristic does not take original optic disc shape into consideration. 40,41 We did not find evidence for an association between OI and SE (BF: 0.91) in our study and our result was in agreement with Takasaki et al 40 and Asai et al 23 who did not find a significant correlation between SE and OI as well. Although OI alone does not result in a satisfying model of SE, it has a strong modulatory effect in combination with other parameters, which is discussed in details further in this section.…”

Section: Discussionmentioning

confidence: 99%

Associations between Optic Nerve Head–Related Anatomical Parameters and Refractive Error over the Full Range of Glaucoma Severity

Baniasadi

Wang

et al. 2017

Trans. Vis. Sci. Tech.

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PurposeTo evaluate the associations between optic disc (OD)-related anatomical parameters (interartery angle [IAA] between superior and inferior temporal retinal arteries, OD tilt [TL], rotation [ROT], and torsion [TO], OD surface curvature [CUR], and central retinal vessel trunk entry point location [CRVTL] on OD) and the spherical equivalent of refractive error (SE), and to assess the impact of glaucoma severity on these relationships.MethodsCirrus optical coherence tomography (OCT) fundus images and 24-2 visual fields of 438 patients were included. Ellipses were fitted to OD borders. IAA was calculated between marked retinal artery locations on a circle around OD. Blood vessel entry point on OD was marked to locate CRVTL. TL was measured as the angle between the lines fitted to OD clinical boundary and the Bruch's membrane edges on the horizontal B-scans. Ellipse rotation relative to the vertical axis defined ROT. Angle between the long axis of OD and the interartery line defined TO. CUR was determined by the inner limiting membrane on the horizontal B-scans. Linear regression models evaluated by Bayes Factors (BF) were used to determine the covariance structure between the parameters and SE as well as possible impacts of mean deviation (MD).ResultsOur results showed that CRVTL had the strongest relationship with SE, followed by ROT, TL, and IAA (BFs: 3.59 × 107, 2645, 1126, and 248, respectively). MD did not significantly modulate the relationship between ONH parameters and SE.ConclusionOur results suggest that SE should be considered when interpreting the OD and its circumpapillary region for diagnostic purposes.Translational RelevanceThe reported relationships between OD-related parameters and ametropia may help to decrease false-positive clinical diagnoses of optic neuropathies.

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“…16,26 Topographic images were obtained through dilated pupils. The intrascan standard deviation was required to be o30 μm.…”

Section: Subjectsmentioning

confidence: 99%

Ocular characteristics associated with the location of focal lamina cribrosa defects in open-angle glaucoma patients

Park

Hwang

Park

2016

Eye

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Purpose To investigate the clinical characteristics according to the location of focal lamina cribrosa (LC) defects and its associated ocular features. Patients and methods A total of 139 openangle glaucoma patients underwent Spectralis optical coherence tomography (OCT) with enhanced depth imaging. Alterations in the contour of the LC were investigated to find focal LC defects. The location of the visible LC defect from the neural canal wall (farperipheral and mid-peripheral) and clockhour position (superotemporal, temporal and inferotemporal) were classified. Disc ovality ratio and disc-foveal angle were measured from disc and retinal nerve fiber layer (RNFL) photographs. The disc tilt degree was measured using a Heidelberg Retina Tomograph (HRT) III system. The en face OCT image of the disc scans was registered to the disc and RNFL photographs, to determine whether the focal LC defects corresponded spatially to the glaucomatous damage location. Results Eyes with far-peripheral LC defects were significantly myopic and had a higher disc ovality ratio. The disc tilt degree obtained by HRT revealed significant temporal disc tilt in eyes with temporal LC defects (Po0.001). Eyes with inferotemporal LC defects had a significantly larger discfoveal angle (P = 0.027). The inferotemporal LC defects corresponded to the location of glaucomatous damage in 81.6%; however, only 46.2% of eyes with a superotemporal LC defect and 3.2% of eyes with a temporal LC defect corresponded spatially with the glaucomatous damage location. Conclusions The clinical characteristics and association with glaucomatous damage location were different according to the location of focal LC defect.

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Relationship between optic disc ovality and horizontal disc tilt in normal young subjects

Abstract: Although the ovality index may be an indicator of stereoscopically obvious horizontal disc tilt, horizontal tilt is more closely related with myopia.

Cited by 33 publications

References 16 publications

Analysis of Peripapillary Geometric Characters in High Myopia Using Swept-Source Optical Coherence Tomography

Analysis of Peripapillary Geometric Characters in High Myopia Using Swept-Source Optical Coherence Tomography

Associations between Optic Nerve Head–Related Anatomical Parameters and Refractive Error over the Full Range of Glaucoma Severity

Ocular characteristics associated with the location of focal lamina cribrosa defects in open-angle glaucoma patients

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