Section 49
Chapter 48,666

Corneal iron ring formation associated with overnight orthokeratology

Hiraoka, T.; Furuya, A.; Matsumoto, Y.; Okamoto, F.; Kakita, T.; Oshika, T.

Cornea 23(8 Suppl): S78-S81


ISSN/ISBN: 0277-3740
PMID: 15448485
DOI: 10.1097/01.ico.0000136687.90275.87
Accession: 048665335

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To describe a case of iron deposition in both eyes after overnight orthokeratology. This is a case report of a 31-year-old man who underwent overnight orthokeratology. The subject was fitted with rigid gas-permeable contact lenses of reverse-geometry design to correct myopia. The prefitting manifest refraction was -4.75 -0.25 x 175 in the right eye and -4.50 -0.25 x 175 in the left eye. There was no corneal abnormality until 9 months after treatment, but development of corneal arcuate lines in both eyes was observed at the 1-year follow-up visit. Visual acuity was not affected. The deposition pattern corresponded to the outside border of central flatter zone, as shown on the corneal topography map. The current findings suggest that tear pooling between the corneal surface and the back surface of the contact lens plays a role in the development of corneal iron ring after orthokeratology with reverse-geometry contact lenses.

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