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Crossed-quadrant homonymous hemianopsia. The "checkerboard" field defect
Journal of Clinical Neuro-Ophthalmology
|September 1, 1982
Summary
This study documents the first case of a "checkerboard" occipital lobe infarction, identified via computed tomography, presenting a unique crossed-quadrant homonymous hemianopsia visual field defect.
Area of Science:
- Neuro-ophthalmology
- Radiology
- Neurology
Background:
- A 70-year-old male with hypertension and coronary artery disease experienced sudden vision loss.
- Previous cases of similar visual field defects are reviewed.
Observation:
- Neuro-ophthalmologic examination revealed normal visual acuity but a distinct "checkerboard" visual field defect (crossed-quadrant homonymous hemianopsia).
- This defect comprised a right upper quadrantanopsia and a left lower quadrantanopsia.
Findings:
- Computed tomography confirmed an occipital lobe infarction pattern consistent with the observed visual field defect.
- A trial with "checkerboard" Fresnel prisms provided minimal improvement in the patient's visual field.
Implications:
- This case represents the first documented instance of a "checkerboard" occipital lobe infarction visualized by computed tomography.
- The findings contribute to understanding the neuroanatomical basis of complex visual field defects and potential management strategies.