Dynamic Skiametry in Theory and Practice Embracing Its Association with Static Skiametry and with Those Optometric Methods Wherein the Correlation of Accommodation and Convergence Must Be Considered

Hardcover. Dark green cloth with gilt titles to spine. Octavo. 218pp, (5) index. 71 illustrations within the text. Small closed tear to the cloth at the top of the spine. Very good.In 1898, Cross was elected president of the New York State Society of Optometrists. He was instrumental in the effort to establish an optometry licensure law in New York State but is probably best known as being the primary developer of early dynamic retinoscopy procedures.