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Contralateral field defect in traumatic globe luxation with optic nerve injury
Sahil Agrawal1, Deepsekhar Das1, Sujeeth Modaboyina1
1Oculoplasty & Paediatric Ophthalmology Services, Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
Clinical & Experimental Optometry
|July 28, 2021
Summary
Traumatic globe luxation can cause vision loss and contralateral field defects. A sustained optic nerve stretch, not complete transection, may lead to these visual field issues in the unaffected eye.
Area of Science:
- Ophthalmology
- Neuroscience
Background:
- Traumatic globe luxation is a rare cause of profound vision loss.
- It can also lead to visual field defects in the contralateral eye.
Purpose of the Study:
- To investigate the mechanism behind contralateral visual field defects in traumatic globe luxation.
- To hypothesize the cause of visual field impairment in the unaffected eye.
Main Methods:
- Retrospective observational study of patients with traumatic globe luxation.
- Analysis of visual fields in the contralateral normal eye as the primary outcome.
Main Results:
- Four patients with traumatic globe luxation and optic nerve injury were studied.
- Three patients with intact ipsilateral optic nerves experienced contralateral quadrantanopia.
- Two of these three patients showed complete visual field recovery within one month.
Conclusions:
- Contralateral field defects in traumatic globe luxation may result from sustained optic nerve stretch, not complete transection.
- This stretch transmits force to the optic chiasm, causing visual field impairment.
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