Synonyms
Definition
Intracellular iron deposition in the corneal epithelial cells which appears as a horizontal line of faint yellow to dark-brown discoloration in the inferior aspect of the cornea (Farjo and Sugar (n.d.)).
Etiology
Iron deposition is a result of pooling of tears in the regions of topographic irregularities, which allows iron from the tear film to be deposited within the epithelium over time (Palay 2011).
Clinical Presentation
Faint yellow to brown horizontal line found close to where the lid margins of the upper and lower lids meet when blinking (Farjo and Sugar (n.d.); Palay 2011). The prevalence increases with age and it is best seen using either cobalt blue or ultraviolet light. For this reason you may first notice it during a slit-lamp examination using fluorescein and cobalt blue illumination (Farjo and Sugar (n.d.); Palay 2011).
Diagnosis
This is a clinical diagnosis. The faint yellow to brown line is found on close examination of the corneal...
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References
Farjo QA, Sugar A (n.d.) Corneal degenerations. In: Yanoff M, Duker JS (eds) Ophthalmology, 4th edn. Saunders, London, pp 269–273
Palay DA (2011) Corneal deposits. In: Krachmer JH, Mannis MJ, Holland EJ (eds) Cornea, 3rd edn. Elsevier, Mosby St. Louis, pp 289–302
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Coleman, M. (2014). Hudson-Stähli Line. In: Schmidt-Erfurth, U., Kohnen, T. (eds) Encyclopedia of Ophthalmology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35951-4_861-1
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DOI: https://doi.org/10.1007/978-3-642-35951-4_861-1
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Publisher Name: Springer, Berlin, Heidelberg
Online ISBN: 978-3-642-35951-4
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