Measure of astigmatism. Decentration A complication caused by movement of the pupil that can be corrected with an enhancement procedure. The layer of the cornea between the stroma and endothelium. The balance of hydration in the eye. Diopters A measurement of refractive error.
Hyperopia is measured in terms of positive diopters.
Myopia is measured in terms of negative diopters. A progressive corneal thinning and bulging. Emmetropes People who have no refractive error. The ophthalmic term for a perfect refractive state. A normal eye in which light rays focus correctly on the retina.