最初描述晶体脱位的可能是Berryat(1749)。一个世纪以后,Stellwag用晶体异位这一名词描述先天性晶体脱位。但是许多年以来,人们已经认识到晶体异位可能为其它眼病及全身性疾病提供重要的诊断线索。晶体异位最明显的眼部表现是视力减退,其视力损害的程度,因晶体脱位的类型、晶体脱位的程度、以及合并存在的眼部异常而异。极轻微的晶体半脱位可能不引起眼部症状。晶体小带断裂时可引起晶体曲度增加,结果导致晶体性近视及散光。如果晶体脱位的眼,同时有青光眼,白内障、或视网膜脱离,其视力预后则更严重,甚至导致失明。晶体异位仍旧是大多数眼科医生在诊断、治疗方面的一个有待于解决的难题。必须进行彻底的全身及眼部检查,以明确其病因,并给予恰如其分的治疗及采取预防措施。本文将复习晶体异位患者的处理、鉴别诊断、可能发生 The initial description of dislocation may be Berryat (1749). A century later, Stellwag used the term ectopic to describe congenital dislocation. However, it has been recognized for many years that ectopic crystals may provide important diagnostic clues to other eye diseases and systemic diseases. The most obvious ocular ectopic ocular manifestations of vision loss, the degree of visual impairment, due to the type of dislocation, the degree of dislocation of the crystal, as well as the combined existence of ocular abnormalities vary. Very slight subluxation of the crystal may not cause ocular symptoms. Crystal small band can cause the curvature of the fracture increases, resulting in crystalline myopia and astigmatism. If the lens dislocation of the eye, with glaucoma, cataracts, or retinal detachment, the prognosis of their vision is more serious, and even lead to blindness. Ectopia is still the most ophthalmologist in the diagnosis and treatment of a problem to be solved. A complete body and eye examination must be performed to identify the cause of the disease and appropriate treatment should be given and preventive measures taken. This article will review the treatment of patients with crystal ectopic, differential diagnosis may occur