湿性黄斑变性不影响周围视力,但可能导致明显的中心视力丧失。
年龄相关性黄斑变性是致使负责中央视力的视网膜部分(黄斑)受累的慢性眼病。该疾病是老年人视力丧失的最常见原因之一。黄斑变性通常会导致视物模糊或扭曲或者视野中央出现盲点。黄斑变性不会影响侧面(周围)视力。
年龄相关黄斑变性分为两种,湿性黄斑变性是其中之一。另一种是干性黄斑变性,这种更为常见但可能不太严重。湿性变性总是始于干性变性,湿性变性仅占黄斑变性患者的 10% 到 15%。
以下原因可能导致湿性黄斑变性视力丧失:
- 血管生长异常。异常血管可能从视网膜下的一层脉络膜开始生长至黄斑。这些血管可能渗漏液体或血液,从而干扰视网膜功能。
- 眼后部液体积聚。视网膜下渗漏的液体可能积聚,导致黄斑层变形。
如果发现任何视力变化,请尽快定期看眼科医生。湿性年龄相关性黄斑变性可能突然出现并迅速进展。治疗可能有助于减缓视力丧失并维持自理能力。
显示参考文献
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Sept. 21, 2023Original article: https://www.mayoclinic.org/zh-hans/diseases-conditions/wet-macular-degeneration/in-depth/what-is-wet-age-related-macular-degeneration/art-20538638