The Trial Case And How To Use It: A Practical Treatise For Optometrists (1904) by Lockwood, Robert Minturn is a comprehensive guide for optometrists on how to effectively use the trial case in their practice. The book provides a detailed explanation of the trial case and its various components, including lenses, frames, and accessories. It also includes practical tips on how to properly use the trial case during eye examinations, how to select the...