Box 6
Contains 755 Results:
Changing Fixation from 1 to 6 requires 15 prism diopters of Positive Convergence. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Fusing the upper pictures requires 3.5 prism diopters of Fusional Convergence. Changing Fixation from upper to lower pictures requires an additional 15 prism diopters of positive Fusional Convergence, a total of 18.5 prism diopters. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Changing Fixation from 1 to 4 requires 4.5 prism diopters of positive Convergence. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
In the Hayfields above Obermmergau, Germany. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Holy Tank of Alwar surrounded by palaces and shrines, India. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Changing fixation from 1 to 6 resquires 15 prism diopters of Positive Convergence. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Changing fixation from 7 to 4 requires 11.5 prism diopters of Positive Convergence. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Changing fixation from 8 to 3 requires 7.5 prism diopters of Positive Convergence. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Changing fixation from 1 to 4 requires 4.5 prism diopters of Positive Convergence. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Fusing the upper pictures require 8.5 prism diopters of convergence Changing fixation from upper to lower pictures requires an additional 20 prism diopters of Positive Fusional Convergence, a total of 28.5 prism diopters. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.