An Improved Gonioscopic Contact Prism

A History of Gonioscopy

“…8). 22 The Allen-Thorpe lens had flanges that held it in place allowing the examiner time and free hands to make detailed drawings of the findings. Four-mirrored lenses, such as the Zeiss, Posner, Sussman, and Volk G-4 lenses, are commonly used today.…”

A History of Gonioscopy

“…8). 22 The Allen-Thorpe lens had flanges that held it in place allowing the examiner time and free hands to make detailed drawings of the findings. Four-mirrored lenses, such as the Zeiss, Posner, Sussman, and Volk G-4 lenses, are commonly used today.…”

A History of Gonioscopy

“…8). 22 The Allen-Thorpe lens had flanges that held it in place allowing the examiner time and free hands to make detailed drawings of the findings. Four-mirrored lenses, such as the Zeiss, Posner, Sussman, and Volk G-4 lenses, are commonly used today.…”

A History of Gonioscopy

“…8). 22 The Allen-Thorpe lens had flanges that held it in place allowing the examiner time and free hands to make detailed drawings of the findings. Four-mirrored lenses, such as the Zeiss, Posner, Sussman, and Volk G-4 lenses, are commonly used today.…”