Incidence of corneal pigmented arc and factors associated with its appearance in orthokeratology.

Title
Incidence of corneal pigmented arc and factors associated with its appearance in orthokeratology.
Source
Ophthalmic & Physiological Optics. 25(6):478-84, 2005 Nov.



PURPOSE:

To determine the incidence of the corneal pigmented arc in orthokeratology (ortho-k) lens wearers over 12 months of lens wear and the factors associated with its appearance.

CONCLUSION:

The incidence of ortho-k-associated pigmented arc increases from 17% after 3 months of lens wear to over 90% after 12 months of lens wear. The intensity of the arc is related to the time when the arc first appeared. Both the incidence and the intensity of the arc are related to the period of lens wear, baseline refractive sphere, spherical equivalent refractive error and the target.

orthokeratology: A method of improving unaided vision by molding the cornea with contact lenses.