On Improving Retinal Photographic Standards

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Abstract
The two sections of this paper will deal with significantly practical developments in new color-film production and with opticalilluminating advances as exemplified by the new Carl Zeiss Fundus Camera. Suggestions will be made relevant to applying the combined developments in a maximally meaningful way, the prime objective being to improve the caliber of retinal photography. Retinography and Film Choice The text of this section will be based directly upon the accompanying Table. The conclusions and information discussed in the following compendium are based on studies conducted by us. Although seven color films have been listed, only five were actually used during the calibration studies. Two German films, not yet available, have been included in order to present a complete list of 35 mm. color films. Film exposure index, expressed in ASA units, is a yardstick of the sensitivity of a film to light. A review of the literature reveals that

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