THE PATHOLOGICAL EFFECTS OF RADIANT ENERGY 

 UPON THE EYE. 



TABLE OF CONTENTS. 



Page 



Introduction 630 



Photophthalmia 634 



Determination of Liminal E>q)osure 638 



Verification of Law of inverse squares 640 



Effect of Repeated Exposures 641 



Limit of Abiotic Action with respect to Wave Length 645 



Record of Experiments (Nos. 37 to 93) 652 



Histological Technique 660 



Reactions of Ocular Tissues to Abiotic Radiation 662 



Clinical; Conjvuictiva and Cornea 662 



Histological Changes Found 665 



Cornea 665 



Conjunctiva 669 



Iris 670 



Lens 671 



Possible Abiotic Effects on Retina 677 



Experiments on Eyes of Rabbits 679 



Experiments on Eyes of Monkeys 681 



Experiment on Human Eye 684 



Possible Abiotic Effects on retina of Aphakic Eye 686 



Refutation of Birch-Hirschfeld's Findings 687 



Thermic Effects of Radiant Energy 692 



Cornea 692 



Iris and Lens 696 



Retina ' 697 



Record of Experiments with concentrated sunlight (Nos. 95 to 101) . 699 



Theory of Action of Radiant Energy on the Tissues 703 



Abiotic Energy in the Solar Spectrum 705 



Snow Blindness 706 



Solar Erythema 708 



Erythropsia 710 



Vernal Catarrh 713 



Senile cataract 715 



Concentration of Energy in Images 716 



General Nature of Absorption of Radiant Energy 717 



Eclipse Blindness and Allied Phenomena 720 



Possible Specific Action of Infra-Red 728 



Experiment relating to accuracy of fixation 732 



Glass Blowers' Cataract 734 



Applications to Commercial Illuminants 737 



Experiment with nitrogen lamp 738 



Experiment with quartz mercury lamp enclosed in globe . . . 742 



Protective Glasses 744 



Ultra Violet Light as a Germicidal Agent. Experimental 



Investigation of its Possible Therapeutic Value 749 



General Conclusions 756 



Systematic Review of the Literature — C. B. Walker 760 



Bibliography .... 794 



Plates 811 



