myotonic cataract

例句：

1. 1.Myotonia is a rare condition that causes muscle weakness and difficulty in movement.
   肌张力是一种罕见的状况，导致肌肉无力和运动困难。
2. 2. Myopathic cataracts are a type of cataract that occurs due to an abnormality in the structure of the lens.
   肌源性白内障是一种由于晶状体结构异常引起的白内障类型。
3. 3. In myotonic cataracts, the muscles become weak and unable to contract properly, leading to difficulty in walking or even standing up.
   在肌张力白内障中，肌肉变得虚弱，无法适当收缩，导致行走或站立困难。