presenile cataract

例句：

1. 1. The patient's vision gradually deteriorated due to the presenile cataract.
   由于老年性白内障，患者的视力逐渐恶化。
2. 2. The doctor advised the patient to undergo surgery for the presenile cataract.
   医生建议患者接受手术治疗老年性白内障。
3. 3. The patient was unable to see clearly due to the presenile cataract, which required a lens implantation surgery.
   由于老年性白内障，患者无法看清，需要植入人工晶状体进行手术。