Cataracts that affect only certain layers of the lens.
The list of signs and symptoms mentioned in various sources for Zonular cataract and nystagmus includes the 10 symptoms listed below:
- Opaque lens
- White pupil reflex
- Blurred vision
- Reading difficulty
- Night driving difficulty
The basic diagnostic workup includes
- visual acuity
- visual fields
- caloric testing
- x-rays of the skull, mastoids, and petrous bones
If these are negative or indefinite, a CT scan or MRI of the brain will be necessary. A spinal fluid analysis will help diagnose central nervous system lues and multiple sclerosis. A BSEP or VEP study may be needed to diagnose multiple sclerosis. The help of a neurologic specialist should be sought before ordering expensive diagnostic tests. Cisternography, tomography, and vertebral basilar angiography are occasionally necessary to establish the diagnosis. Magnetic resonance angiography is an excellent noninvasive means of visualizing the vertebral-basilar circulation.
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