Duration 5min, Q&A 3min
Sine Curve Approach of Optic Disc Tilt and Its Association with Axial Length and Body Height in Healthy Eyes
To investigate sine curve approach of optic disc tilt using the spectral domain optical coherence tomography (SD-OCT) and its association with axial length and body height in young Japanese healthy eyes.
Prospective observational cross-sectional study comprised 126 right eyes of 126 healthy young Japanese participants.
All participants (mean age 26.0 ± 4.1) underwent comprehensive ophthalmologic examination, including axial length and peripapillary retinal nerve fiber layer (RNFL) thickness imaging. Axial length was measured with the AL-2000 ultrasound device (TOMEY, Japan). Optic disc tilt was assessed using the TOPCON 3D OCT-1000 MARK II RNFL 3.4 mm circle scan images. The trajectory of the retinal pigment epithelium was fitted to sine curve using Image J and the amplitude of the sine curve was used for the degree of the optic disc tilt. The relationship between the amplitude and the axial length or the body height was investigated using linear regression analysis.
Results and Conclusion
The mean axial length was 25.43 ± 1.45 mm, the mean amplitude was 36.6 ± 17.5 pixels and the mean body height was 167.6 ± 8.4 cm. The amplitude was significantly negatively associated with the body height (R=-0.38, p<0.001) but not associated with the axial length (R=0.12, p=0.19). In this sine curve approach, the degree of the optic disc tilt decreased as the body height increased. However, there were no significant association between the degree of the optic disc tilt and the axial length.
[ Keyword ]
imaging / optical coherence tomography / optic disc
[ Conflict of Interest ]