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Vision Disorders

Lens Displacement

In a normal eye, the crystalline lens fits snugly behind the iris. Either complete (dislocated) or partial (subluxated) lens displacement causes the iris to wobble as the lens is no longer supporting it, or the edge of the lens may be visible through the pupil. If the lens moves forward into the anterior (frontal) chamber or backward into the posterior (rear) chamber, interrupted flow of fluid may cause glaucoma. Immediate rectification is necessary to prevent blindness in the affected eye. Posterior subluxation will also cause cataracts, and—because the lens moves about—the patient experiences rapid and frequent changes in visual acuity.

Additional topics

Science EncyclopediaScience & Philosophy: Verbena Family (Verbenaceae) - Tropical Hardwoods In The Verbena Family to WelfarismVision Disorders - Refractive Errors, Hyperopia/presbyopia, Other Refractive Errors, Strabismus, Nonparalytic Strabismus, Paralytic Strabismus - Myopia, Astigmatism, Glaucoma, Secondary glaucomas, Degeneration of the macula, Retinal dystrophies