The particle は is used to identify the topic of the sentence, emphasizing information about the subject.水晶体は、光を曲げて、物をはっきり見せます。
Verb in て-form + くださいN5
Used to politely request or suggest someone to do something. (In this passage, the form 目を大切にしましょう is an invitational form, but the original pattern is Verb in て-form + ください or Verb in ましょう-form; here, the pattern Verb in ましょう-form is extracted because it appears more clearly.)目を大切にしましょう。
Verb dictionary form + ことができますN5
Express the ability to do something.これで、物をはっきり見ることができます。
Dictionary form of verb + とN5
Expresses a condition: when one action occurs, the result will happen immediately after that (if... then...).年を取ると、水晶体が曇ることがあります。
