Why was Helen taken to Baltimore?

Hellen was taken to an expert oculist (ophthalmologist or optometrist) who had helped patients deemed a lost cause,

When I was about six years old my father heard of an eminent oculist in Baltimore.

Heller was taken to Baltimore in the hope that she could see again with the help of an expert oculist.also,if they could get any teacher for her who know the techniques to teach such physically challenged people.