Purpose: To investigate spectral domain optical coherence tomography (SD-OCT)-detected optic disc margin anatomy in the monkey eye by colocalizing disc photographs to SD-OCT scans acquired from the same eyes.
Methods: The neural canal opening (NCO) was delineated within 40 digital radial sections generated from SD-OCT volumes acquired from 33 normal monkey eyes (15 degrees, 290 x 768 horizontal grid pattern). Each volume was colocalized to its disc photograph by matching the retinal vessels within each photograph to vessel outlines visible within en face SD-OCT images. Border tissue was delineated where it extended internally to the NCO. A clinician (masked to delineated points) marked the disc margin onto each photograph while viewing the relevant stereophotograph pair. Alignment of the clinician-ascribed disc margin to the NCO and border tissue delineation was assessed. The process was repeated in a single myopic human eye.
Results: In 23 eyes, the NCO aligned to the disc margin. In 10 eyes, externally oblique border tissue was detectable in the temporal disc. In these regions of the disc, the termination of border tissue was the disc margin. An exaggerated form of this phenotype was observed in the myopic human eye. In this case, temporal border tissue terminated at the anterior scleral canal opening, which was detected as the disc margin.
Conclusions: The termination of Bruch's membrane, border tissue, and the anterior scleral canal opening may constitute the disc margin within the same eye, depending on the border tissue architecture; this anatomy is consistently visualized by SD-OCT.
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http://dx.doi.org/10.1167/iovs.09-3586 | DOI Listing |
J Neuroophthalmol
January 2025
Departments of Ophthalmology (DB, G-SY, GTL, RAA) and Neurology (DB, GTL, RAA), Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; and Division of Ophthalmology (AG, GTL, RAA), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
Background: In children, pseudopapilledema is frequently caused by peripapillary hyperreflective ovoid mass-like structures (PHOMS) or optic disc drusen (ODD). While enhanced depth imaging (EDI) OCT can identify both, lack of cooperation, especially from younger children due to the duration of testing, often necessitates the use of B-scan ultrasound (BSUS). This study investigated whether PHOMS are hyperreflective on BSUS and if BSUS can differentiate PHOMS from ODD.
View Article and Find Full Text PDFActa Otorhinolaryngol Ital
December 2024
IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
Objectives: Several devices have been developed to improve head and neck surgery. 3D exoscopes provide surgeons a viable alternative to microscopes. We propose our setting for transoral exoscopic oropharyngeal (TOEOS) and transoral exoscopic laryngeal surgery (TOELS).
View Article and Find Full Text PDFSci Rep
January 2025
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA, 02134, USA.
Many aquatic organisms utilize suction-based organs to adhere to diverse substrates in unpredictable environments. For multiple fish species, these adhesive discs include a softer disc margin consisting of surface structures called papillae, which stabilize and seal on variable substrates. The size, arrangement, and density of these papillae are quite diverse among different species, generating complex disc patterns produced by these structures.
View Article and Find Full Text PDFOphthalmol Sci
November 2024
Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Purpose: Autologous retinal transplantation has been successfully employed in the treatment of large and myopic macular holes that are refractory to standard surgical treatments. Patients transplanted with a peripheral neurosensory retinal graft have shown unexpected improvements in visual acuity. The study aims to investigate if neural integration of the graft takes place in a porcine model of retinal hole.
View Article and Find Full Text PDFJ Stomatol Oral Maxillofac Surg
January 2025
Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China. Electronic address:
Purpose: To analyze dynamic and static changes in the disc-condyle relationship in patients with skeletal Class III malocclusion after orthognathic surgery.
Methods: The surgical group comprised 30 patients with skeletal Class III malocclusion, and the magnetic resonance imaging and mandibular movement data were obtained at T0 (preoperatively), T1 (3 months postoperatively), and T2 (at the end of orthodontic treatment). The control group included 20 patients with normal occlusion, and the mandibular movement data were recorded.
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