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高血压性视网膜病变(hypentensive retinopathy)根据高血压的分类而分为急性高血压及慢性高血压性视网膜病变两种。二者的眼底改变也不尽相同。任何原因使血压增高均可产生高血压性视网膜病变。原发性高血压以慢性进行性多见,常发生于中老年,其致病因素,目前尚不十分明确,可能系由于视丘下部作为管制和维持正常血压的中枢调节机制不稳定;或调节减弱,使来自脊髓和延髓的节段中枢的神经兴奋,而使内脏循环血管收缩所致。
Hypertensive retinopathy (hypentensive retinopathy) according to the classification of hypertension and into two types of acute hypertensive and chronic hypertensive retinopathy. The fundus changes both are not the same. For any reason make high blood pressure can produce hypertensive retinopathy. Chronic progressive primary hypertension more common, often occurs in middle-aged and elderly, its pathogenic factors, is not yet very clear, may be due to hypothalamus as the central regulatory mechanism to regulate and maintain normal blood pressure instability; or regulation Weakened, so that from the spinal cord and medulla oblongata central nervous excitement, leaving the visceral circulation caused by blood vessels.