Rotation of retinal vascular arcades and comparison with disc-fovea angle in the assessment of cycloposition

Piedrahita-Alonso, Elena; Valverde-Megías, A.; Gómez-de-Liaño, R.

doi:10.1136/bjophthalmol-2013-303680

Cited by 18 publications

(14 citation statements)

References 9 publications

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“…19,26,27,28 Consistent with the literature, the range of FoDi angles in our patients was -24.4° to +11.6° and the mean value was -6.43±4.96°. The range of absolute deviation angles between the anatomical axis and the horizontal axis was 0-24.4°, and the mean absolute deviation was 7.14±3.95°.…”

Section: Discussionsupporting

confidence: 91%

Does Foveal Position Relative to the Optic Disc Affect Optical Coherence Tomography Measurements in Glaucoma?

Tuncer

Altuğ

2018

tjo

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Objectives:To determine interindividual variability in the angle between the anatomic axis connecting the fovea and optic disc center and the horizontal meridian using spectral domain optical coherence tomography (OCT).Materials and Methods:A total of 260 eyes of 133 subjects (81 women, 52 men) with glaucoma or suspected glaucoma were included in the study retrospectively. Fovea-disc angle (FoDi angle) measurements, determined as the angle between the horizontal meridian passing through the Bruch’s membrane opening (BMO) center and the line connecting the fovea and BMO center, were recorded from spectral domain-OCT scans performed by the same investigator. FoDi angle was defined as negative if the fovea was located below the horizontal meridian through the BMO center and positive if the fovea was located above it.Results:The mean age of the participants was 56.5±14.6 years (27-83 years). The mean FoDi angle was -6.43±4.96° (range: -24.40° to +11.60°). Absolute deviation of the fovea BMO axis from the horizontal axis was 0-5° in 83 eyes (31.92%), 5-10° in 124 eyes (47.69%), 10-15° in 41 eyes (15.76%), 15-20° in 10 eyes (3.84%), and greater than 20° in 2 eyes (0.79%).Conclusion:Most OCT devices currently used in the treatment and follow-up of glaucoma patients provide peripapillary retinal nerve fiber layer (RNFL) thickness measurements that are made based on a clinical axis in reference to the horizontal meridian passing through the optic disc center. The results of our study reveal interindividual variation in FoDi angle as well as intraindividual differences in FoDi angle between fellow eyes in the same individual. Disparity between clinical and anatomic quadrants could impact RNFL thickness measurements, which may lead to errors in the diagnosis of glaucoma.

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Section: Discussionsupporting

confidence: 91%

Does Foveal Position Relative to the Optic Disc Affect Optical Coherence Tomography Measurements in Glaucoma?

Tuncer

Altuğ

2018

tjo

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“…The optic disc–fovea angle is another parameter that we used to detect interocular asymmetry. The optic disc–fovea angle measurement is accepted as the gold standard method for assessing the cycloposition [24]. This angle varies widely among normal individuals, but variation between the left and right eyes of the same person was not significant [25].…”

Section: Discussionmentioning

confidence: 99%

Macular asymmetry analysis in sighting ocular dominance

Pekel

Acer

Özbakış

et al. 2014

The Kaohsiung J of Med Scie

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Sighting ocular dominance is the preference of one eye over the other in terms of sighting. In this study, our aim was to examine differences in interocular and intraocular macular thickness, interocular fovea-optic disc angle, and foveal blood vessel asymmetries associated with sighting ocular dominance. Ninety eyes of 45 healthy young adults were included in this prospective, cross-sectional, and comparative study. Sighting ocular dominance was determined by a hole-in-the-card test. Macular thickness measurements were taken and posterior pole asymmetry analysis conducted with spectral domain optical coherence tomography. The optic disc-fovea angle and visible foveal blood vessel counts were calculated by using the posterior pole retinal images of optical coherence tomography. The mean age of the participants was 27.3 (standard deviation [SD] 6.6) years. There were 20 males and 25 females. The mean total macular area thickness, and mean macular thickness of the superior and inferior hemispheres of the dominant and nondominant eyes were similar (p > 0.05). Macular asymmetry analysis revealed no statistically significant interocular difference (p > 0.05). In the dominant eyes, the mean optic disc-fovea angle was 5.24° (SD 1.77), whereas it was 5.49° (SD 2.58) in the nondominant eyes (p = 0.51). The number of visible blood vessels passing through the fovea was similar in the dominant and nondominant eyes (p > 0.05). These results suggested that interocular and intraocular macular thickness differences, interocular fovea-optic disc angle differences, and number of visible foveal blood vessels are not associated with sighting ocular dominance.

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“…The authors recommended adjusting BMO-MRW and RNFL thickness for age and sector to optimize the glaucoma diagnosis. It is important to point out that values ranging between À5.6 8 and À7.7 8 have already been reported previously [17][18][19][20]. Using Cirrus OCT, Mwanza et al [21 && ] found an average fovea-to-disc (FoDi) angle of À7.4 8 in 282 multiethnic normal participants (mean age: 47.7 years), 7.1 8 in nonglaucomatous myopes, and 7.6 8 in glaucomatous patients.…”

Section: Optic Nerve Head Parametersmentioning

confidence: 76%

Optical coherence tomography platforms and parameters for glaucoma diagnosis and progression

Mwanza

Budenz

2016

Current Opinion in Ophthalmology

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Rotation of retinal vascular arcades and comparison with disc-fovea angle in the assessment of cycloposition

Cited by 18 publications

References 9 publications

Does Foveal Position Relative to the Optic Disc Affect Optical Coherence Tomography Measurements in Glaucoma?

Does Foveal Position Relative to the Optic Disc Affect Optical Coherence Tomography Measurements in Glaucoma?

Macular asymmetry analysis in sighting ocular dominance

Optical coherence tomography platforms and parameters for glaucoma diagnosis and progression

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