Hobbs Samuel D., Tripathy Koushik, Pierce Kristine
Wilford Hall Ambulatory Surgical Center
ASG Eye Hospital, BT Road, Kolkata, India
The retina is a layer of neurosensory tissue in the eye that converts light into neural signals, which the brain interprets as images. The macula is the part of the retina with the highest concentration of cones essential for central vision. Wet age-related macular degeneration (AMD), also known as exudative or neovascular AMD, primarily affects the macula and is the most common cause of central visual impairment and blindness among older individuals in developed countries. Vascular endothelial growth factor (VEGF) drives the development of choroidal neovascularization (CNV), where new vessels grow under or through the retinal pigment epithelium (RPE), often through breaks in the Bruch membrane. (see . Peripapillary Choroidal Neovascular Membrane). Regular administration of intravitreal anti-VEGF medications may prevent blindness in most patients with wet AMD. In the absence of such treatment, patients experience severe, irreversible vision loss.
视网膜是眼睛中的一层神经感觉组织,它将光转换为神经信号,大脑将这些信号解读为图像。黄斑是视网膜上视锥细胞浓度最高的部分,对视中心视力至关重要。湿性年龄相关性黄斑变性(AMD),也称为渗出性或新生血管性AMD,主要影响黄斑,是发达国家老年人中心视力损害和失明的最常见原因。血管内皮生长因子(VEGF)驱动脉络膜新生血管(CNV)的形成,新血管在视网膜色素上皮(RPE)下方或穿过RPE生长,通常通过 Bruch 膜的破损处生长(见视乳头周围脉络膜新生血管膜)。定期玻璃体内注射抗VEGF药物可预防大多数湿性AMD患者失明。若不进行此类治疗,患者会经历严重的、不可逆转的视力丧失。