The television ophthalmoscope is no longer a new instrument; the first such device was demonstrated by Ridley nearly 10 years ago.1 Nor is the idea of ophthalmoscopy with restricted wave lengths a novel concept. The extensive investigations of Vogt with "red-free light"2 and the later Work of Kugelberg3 and Kornerup4 utilizing photography or a photomultiplier tube have explored some of the qualitative aspects of this approach. However, the combination of television ophthalmoscopy and monochromatic illumination offers unique and hitherto unexploited possibilities for new findings particularly when the line-selector technique (vide infra) is used to obtain quantitative data. The details of equipment and procedure for such determinations together with some preliminary results are contained in the present paper.
A. Principles of Operation
A detailed description of the scanning process and of line selection is given in the Appendix, Part I.The television camera tube, the Image Orthicon,
POTTS AM, WEST SS, SHEARER JR. Application of Television Ophthalmoscope to Some Problems of Clinical Ophthalmology. AMA Arch Ophthalmol. 1959;62(3):485-499. doi:10.1001/archopht.1959.04220030141018