Nasal myopic super-traction (or super-involute) of the optic nerve head
| Autor: | Jay M. Enoch |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
medicine.medical_specialty
Retina Materials science genetic structures business.industry medicine.medical_treatment Nerve fibre layer Traction (orthopedics) eye diseases Atomic and Molecular Physics and Optics Southeast asia medicine.anatomical_structure Optics Involute Ophthalmology medicine Optic nerve Blood supply sense organs Choroid business |
| Zdroj: | Journal of Modern Optics. 54:1241-1262 |
| ISSN: | 1362-3044 0950-0340 |
| DOI: | 10.1080/09500340600855114 |
| Popis: | Related recent studies are brought together; 38% of high myopes with corrections = −5.00 D or greater exhibit separation and displacement of retina (less nerve fibre layer) and choroid from moorings on the nasal optic nerve, and the displaced tissues move onto/over the disc. This is termed ‘nasal myopic super-traction of the optic nerve head'. Increasing prevalence of myopia (particularly in East and Southeast Asia), make understanding this anomaly important! In affected subjects, OCT proved valuable. Evidence is presented of disc-related separation of retina and choroid, less nerve fibre layer. We measured vision, kinetic/static thresholds, and Stiles–Crawford I on the disc. Transient alterations in sensitivity and photoreceptor orientations were found and associated with saccades or serial OKN-induced traction. Given presence of visual functions on the disc, blood supply and neural connectivity were inferred (partially) intact. Is this a strain-relieving mechanism, or a precursor to further degenerative... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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