scholarly journals Ocular imaging findings of bilateral optic disc pit in a child

2013 ◽  
Vol 5 (2) ◽  
pp. 258-261 ◽  
Author(s):  
Abdullah Ozkaya ◽  
Z Alkin ◽  
AT Taylan ◽  
A Demirok
Keyword(s):  
Visual Acuity ◽  
Optic Nerve ◽  
Nerve Fiber ◽  
Optic Disc ◽  
Anterior Segment ◽  
Rare Condition ◽  
Optic Disc Pit ◽  
Fiber Layer ◽  
Retinal Nerve Fiber

Background: To report a rare condition of bilateral optic disc pit in a child. Case description: A ten-year-old female was admitted with a complaint of headache. Visual acuity was 20/20 in both eyes (OU). Anterior segment examination was normal in OU. Fundus examination revealed optic disc pit (ODP) located temporally with a diameter of 1/5 disc diameter in OU. Intraocular pressure was within normal limits in both eyes. Macular optical coherence tomography (OCT) showed a loss of retinal tissue at the site corresponding to the ODP in both eyes. Retinal nerve fiber OCT revealed decreased RNFL thickness at the temporal side of the optic nerve, corresponding to the ODP in both eyes. The patient and patient’s parents were informed about the disease and called for follow-up examinations every 6 months. In addition, the family was informed about optic pit maculopathy (OPM) and, they were told to return immediately if the patient ever complained of decreased vision in either of her eyes. After a follow-up period of 12 months, visual acuity remained stable, and no complications secondary to ODP were detected. Conclusion: Optic disc pit is diagnosed incidentally unless it is complicated with OPM. The retinal nerve fiber layer thickness is decreased at the side of the optic nerve corresponding to the ODP. Nepal J Ophthalmol 2013; 5(10): 258-261 DOI: http://dx.doi.org/10.3126/nepjoph.v5i2.8739

scholarly journals Unilateral Extensive Myelinated Retinal Nerve Fiber Layer in a Child

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Rafidah Md Saleh ◽  
Maimunah Abdul Munaaim
Keyword(s):  
Visual Acuity ◽  
Nerve Fiber ◽  
Optic Disc ◽  
Retinal Nerve Fiber Layer ◽  
Anterior Segment ◽  
Fiber Layer ◽  
Benign Condition ◽  
Nerve Fiber Layer ◽  
The Right ◽  
Retinal Nerve Fiber

We are reporting a case of an incidental finding of an extensive Myelinated Retinal Nerve Fiber Layers (MRNFL)  in a healthy 12-year-old Malay boy. The child did not complain of any blurring of vision until he accidentally closed his seeing eye. On examination, the right visual acuity was 6/6 while the left visual acuity was 6/150. There was no Relative Afferent Pupillary Defect (RAPD). The anterior segment was unremarkable. The fundus of the right eye was normal with a pink optic disc with CDR of 0.4, however, the left eye showed extensive MRNFL involving the whole fundus but sparing the macula. The subjective refraction of the right eye was Plano with 6/6 vision, while the left was –5.50/-1.50x50 with a vision of 6/150. Bjerrum of the right eye was normal but the left eye showed tunnel field at around 20 degrees with 2mm target size. His Humphrey Visual Field (HVF) 30-2, for the right eye, was normal with MD -0.90 while the left eye showed a generalized reduction of the field with MD of -20.23. Optical Coherence Tomography (OCT) of the right eye was normal while the affected eye showed thickening of the RNFL at the peripheral. The other layers of the retina and the foveal region of anatomy were somehow preserved. The axial length of the right eye was 24.10mm while the left eye was 28.06mm. MRNFL is a benign condition. It is commonly seen as a streak of whitish patch starting from the optic disc extending to the retina following the arcuate nerve fiber layer pattern, however, extensive myelinated retinal nerve fiber layer involving the whole retina was not very common and usually associated with amblyopia, axial myopia, and squint. Even though mostly benign and solitary, MNFL can be associated with other systemic condition, therefore, clinicians must rule out other systemic diseases.

scholarly journals Modeling the Chronic Loss of Optic Nerve Axons and the Effects on the Retinal Nerve Fiber Layer Structure in Primary Disorder of Myelin

2016 ◽  
Vol 57 (11) ◽  
pp. 4859 ◽  
Author(s):  
Leandro B. C. Teixeira ◽  
James N. Ver Hoeve ◽  
Joshua A. Mayer ◽  
Richard R. Dubielzig ◽  
Chelsey M. Smith ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Nerve Fiber ◽  
Retinal Nerve Fiber Layer ◽  
Layer Structure ◽  
Fiber Layer ◽  
Nerve Fiber Layer ◽  
Primary Disorder ◽  
Retinal Nerve Fiber

Long-term follow-up of retinal nerve fiber layer cleavages in glaucoma patients and suspects

2018 ◽  
Vol 256 (10) ◽  
pp. 1945-1952 ◽  
Author(s):  
Yun Hsia ◽  
Chien-Chia Su ◽  
Tsing-Hong Wang ◽  
Chung-May Yang ◽  
Jehn-Yu Huang
Keyword(s):  
Nerve Fiber ◽  
Retinal Nerve Fiber Layer ◽  
Fiber Layer ◽  
Nerve Fiber Layer ◽  
Long Term Follow Up ◽  
Retinal Nerve Fiber

Automated Perimetry in Glaucoma

Visual Fields ◽  
2010 ◽  
Author(s):  
Hylton R. Mayer ◽  
Marc L. Weitzman
Keyword(s):  
Optic Nerve ◽  
Visual Field ◽  
Nerve Fiber ◽  
Optic Disc ◽  
Structural Damage ◽  
Visual Field Defects ◽  
Fiber Layer ◽  
Glaucomatous Damage ◽  
Retinal Fibers ◽  
Field Defects

Clinical experience and multiple prospective studies, such as the Collaborative Normal Tension Glaucoma Study and the Los Angeles Latino Eye Study, have demonstrated that the diagnosis of glaucoma is more complex than identifying elevated intraocular pressure. As a result, increased emphasis has been placed on measurements of the structural and functional abnormalities caused by glaucoma. The refinement and adoption of imaging technologies assist the clinician in the detection of glaucomatous damage and, increasingly, in identifying the progression of structural damage. Because visual field defects in glaucoma patients occur in patterns that correspond to the anatomy of the nerve fiber layer of the retina and its projections to the optic nerve, visual functional tests become a link between structural damage and functional vision loss. The identification of glaucomatous damage and management of glaucoma require appropriate, sequential measurements and interpretation of the visual field. Glaucomatous visual field defects usually are of the nerve fiber bundle type, corresponding to the anatomic arrangement of the retinal nerve fiber layer. It is helpful to consider the division of the nasal and temporal retina as the fovea, not the optic nerve head, because this is the location that determines the center of the visual field. The ganglion cell axon bundles that emanate from the nasal side of the retina generally approach the optic nerve head in a radial fashion. The majority of these fibers enter the nasal half of the optic disc, but fibers that represent the nasal half of the macula form the papillomacular bundle to enter the temporal-most aspect of the optic nerve. In contrast, the temporal retinal fibers, with respect to fixation, arc around the macula to enter the superotemporal and inferotemporal portions of the optic disc. The origin of these arcuate temporal retinal fibers strictly respects the horizontal retinal raphe, temporal to the fovea. As a consequence of this superior-inferior segregation of the temporal retinal fibers, lesions that affect the superotemporal and inferotemporal poles of the optic disc, such as glaucoma, tend to cause arcuateshaped visual field defects extending from the blind spot toward the nasal horizontal meridian.

Optic Disc and Retinal Nerve Fiber Layer Analysis With Scanning Laser Tomography After LASIK

2006 ◽  
Vol 22 (4) ◽  
pp. 372-375 ◽  
Author(s):  
Naoki Hamada ◽  
Tadayoshi Kaiya ◽  
Tetsuro Oshika ◽  
Satoshi Kato ◽  
Goji Tomita ◽  
...  
Keyword(s):  
Nerve Fiber ◽  
Optic Disc ◽  
Retinal Nerve Fiber Layer ◽  
Scanning Laser ◽  
Fiber Layer ◽  
Nerve Fiber Layer ◽  
Laser Tomography ◽  
Layer Analysis ◽  
Retinal Nerve Fiber
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