The second operation to correct her vision she would never have peripheral vision or dance again, she proved everyone wrong. After her third surgery she finally returned to dancing and got a big break
to dance "Giselle" after Alicia Markova became ill, however she was almost blind and still danced it wonderfully. The clip below-right shows this famous dance.
Wiki states: "Youskevitch and her other partners quickly became expert at helping Alonso conceal her handicap. To compensate for only partial sight in one eye and no peripheral vision, the ballerina trained her partners to be exactly where she needed them without exception. She also had the set designers install strong spotlights in different colors to serve as guides for her movements. Alonso knew, for instance, that if she stepped into the glow of the spotlights near the front of the stage, she was getting too close to the orchestra pit.
There was also a thin wire stretched across the edge of the stage at waist height as another marker for her, but in general she danced within the encircling arms of her partners and was led by them from point to point. Audiences were reportedly never the wiser as they watched the prima ballerina."
In 1948 Alicia formed the "Academia Nacional de Ballet Alicia Alonso" in Havana. The Havana Press donated land for them to build their school. She formed her own troupe called the Alicia Alonso Company.