An Upper West Side optometrist was arrested yesterday for allegedly trying to slip his hand up the dress of a patient twice during her eye exam.

“It’s your loss,” Dr. Stuart Blankman, 75, allegedly told the 48-year-old mother of four after she rebuffed his unwanted advances inside his Broadway office near West 92nd Street, police sources said.

The frazzled woman called her husband, who, in turn, called the cops on the physician, the sources said.

Blankman was arrested on charges of forcible touching, the sources added.