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Contrast sensitivity measurements in acute and resolved optic neuritis.
The British Journal of Ophthalmology
|October 1, 1984
Summary
Contrast sensitivity remains impaired in most eyes even after optic neuritis resolves, regardless of visual acuity improvements. This highlights the limitations of standard visual acuity tests in assessing full visual function recovery.
Area of Science:
- Ophthalmology
- Neuro-ophthalmology
- Visual Neuroscience
Background:
- Optic neuritis is an inflammatory condition affecting the optic nerve.
- Visual acuity is a common measure of visual function but may not fully capture visual deficits.
Purpose of the Study:
- To evaluate contrast sensitivity in patients with acute and resolved optic neuritis.
- To determine the persistence of contrast sensitivity deficits after visual acuity recovery.
Main Methods:
- Contrast sensitivity was measured using Arden grating plates.
- The study included 41 eyes with acute optic neuritis and 51 eyes with resolved optic neuritis.
Main Results:
- 93% of eyes in the acute phase and 78% in the resolved phase showed abnormal contrast sensitivity.
- Even with visual acuity of 6/7.5 or better, 67% of resolved eyes had impaired contrast sensitivity.
Conclusions:
- Contrast sensitivity deficits persist in a significant proportion of eyes after optic neuritis resolution.
- Standard visual acuity may not reflect the full extent of visual dysfunction following optic neuritis.
- Contrast sensitivity testing is crucial for a comprehensive assessment of visual recovery in optic neuritis.