Translation of "Narrowed" in Spanish

I narrowed it down to one word, two letters, one syllable:

Lo reduzco a una palabra, dos letras, una sílaba:

Long has it been since the industry has encountered a technological breakthrough, nor even has taken a considerable step forward. This narrowed and shortened the view.

Mucho tiempo ha pasado desde que la industria ha encontrado un gran avance tecnológico y ni siquiera ha dado un paso considerable hacia adelante. Esto redujo y acortó la perspectiva.