This is the 13763rd most frequent Russian word.
нехирургической
Non-surgical.
In this sentence, 'нехирургической' is used as an adjective describing 'alternative', indicating that the treatment method does not involve surgery.
Этот метод лечения является нехирургической альтернативой.
This treatment method is a non-surgical alternative.
Here, 'нехирургические' is an adjective used to describe 'methods'. The term implies approaches that do not require surgical procedures.
Мы предлагаем нехирургические способы устранения этой проблемы.
We offer non-surgical methods to address this issue.
In this sentence, 'нехирургическая' modifies 'correction', explaining that the correction of vision is achieved through means apart from surgery.