Abstract
Purpose
Many visual symptoms originating from a spontaneous Pulfrich phenomenon can be alleviated by the provision of a tinted lens worn in front of the least affected eye. Here, we report on the long-term outcome of four patients who have been provided with a uniocular tinted spectacle or contact lens.
Methods
The case notes of four cases were reviewed. The review period was at least 5 years in all four cases.
Results
In all cases, visual symptoms and perceptual difficulties occurring from the spontaneous Pulfrich effect were completely eliminated over a period of many years. In one case, the relief has been sustained over a 20-year period.
Conclusions
A uniocular tinted lens, or contact lens, provides immediate and lasting relief from the visual difficulties caused by the visual delay underlying the spontaneous Pulfrich effect.
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The authors have no competing interests
Contributors: KT reviewed the clinical data. GH and GD diagnosed and managed the patients and drafted the manuscript, which was edited by all parties
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Heron, G., Thompson, K. & Dutton, G. The symptomatic Pulfrich phenomenon can be successfully managed with a coloured lens in front of the good eye—a long-term follow-up study. Eye 21, 1469–1472 (2007). https://doi.org/10.1038/sj.eye.6702459
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DOI: https://doi.org/10.1038/sj.eye.6702459
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