![]() ![]() Uveitis (inflammation of the eye) causes the pupil to constrict ( miosis) and trap the lens in the anterior chamber, leading to an obstruction of outflow of aqueous humour and subsequent increase in ocular pressure (glaucoma). This can cause glaucoma, uveitis, or damage to the cornea. With anterior lens luxation, the lens pushes into the iris or actually enters the anterior chamber of the eye. Lens luxation in cats can occur secondary to anterior uveitis (inflammation of the inside of the eye). Steroid administration weakens the zonules and can lead to luxation, as well. Luxation can also be a secondary condition, caused by trauma, cataract formation (decrease in lens diameter may stretch and break the zonules), or glaucoma (enlargement of the globe stretches the zonules). Abnormal development of these zonules can lead to primary ectopia lentis, usually a bilateral condition. Ciliary zonules normally hold the lens in place. A partial dislocation of a lens is termed lens subluxation or subluxated lens a complete dislocation of a lens is termed lens luxation or luxated lens.Īlthough observed in humans and cats, ectopia lentis is most commonly seen in dogs. Zonular fibers are being seen.Īnterior lens luxation in a dog Anterior lens luxation with cataract formation in a catĮctopia lentis is a displacement or malposition of the eye's crystalline lens from its normal location.
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