Purchase this article with an account.
Fumi Tanabe, Chota Matsumoto, Sachiko Okuyama, Shigeki Hashimoto, Hiroki Nomoto, Tomoyasu Kayazawa, Mariko Eura, Takuya Numata, Yoshikazu Shimomura; Temporal retinal nerve fiber trajectory by OCT and its influence on the Humphrey 10-2 test points. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):631.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Detailed assessment of the visual field at the macular region and its correspondence with the structural changes are essential for accurate diagnosis of glaucoma. However, the anatomical arrangement of the optic disc and macula varies individually, which makes it difficult to match the visual field to structural changes. At an early stage of glaucoma, it is also difficult to detect the temporal RNFB trajectories that correspond to the characteristic changes in the visual field. In this study, using Swept Source OCT (SS-OCT, TOPCON), we obtained a detailed description of the temporal RNF trajectories and corresponded these OCT images with the 10-2 program to see if these positions affected the superior and inferior visual field.
Normal volunteers were 22 eyes. (spherical equivalent, -3.3 ± 2.7D, average age, 35.5 ± 9.4 years). Three-dimensional images were taken using Atlantis (SS-OCT), and were analyzed by EnView. Using the 3D OCT images, an image of the cross plane that fitted the inner limiting membrane (ILM) was reconstructed, and the RNF trajectories lying immediately under the ILM were depicted. By matching the vessels, the reconstructed images of the cross plane were superimposed on the fundus photograph. A composite image covering the optic disc, fovea, and temporal raphe was obtained. The detailed location of the blind spot was detected using an Octopus 900 custom test. By matching the fixation point to the fovea and the center of the blind spot to the center of the optic disc, we superimposed the inverted arrangement of the 10-2 program on the OCT image to evaluate if the superior and inferior clusters of the 10-2 program were affected by the positions of the optic disc, macula, and temporal raphe.
In 10 of the 22 (46%) subjects, the position of the optic disc affected the 3 test points near the optic disc in the temporal inferior field. In 5 of the 22 (22.7%), the position of the temporal raphe affected the 2 distal test points in the nasal inferior field.
Influence of the optic disc position on the superior and inferior clusters was observed in approximately 46% of the subjects when the 10-2 program was matched with the OCT image. The optic disc position had a greater impact on the HFA10-2 test points in the inferior and superior clusters than the temporal raphe position.
This PDF is available to Subscribers Only