Before discussing the prevention of blindness in adults, I wish to say a few words concerning the attitude of oculists toward patients suffering from eye diseases which, in all probability, will result in loss of vision. If, for some special reason, the oculist fears it would be unwise to tell the patient that blindness is imminent, he should at least urge him to conserve his remaining vision, and advise him to do as many things as possible by touch, and warn him of the consequences of eyestrain. But, whenever possible, it is kinder to prepare the patient for oncoming blindness, so that he may shape his life accordingly, and may be induced to learn to read raised type, and use a writing device, before the light is entirely gone. Most of us exclaim over our trifling hurts, the mosquito bites of life, but when the real trial comes, when we know we must face a great crisis, we square our shoulders, take a long breath, and meet the inevitable with courage and fortitude. I wish the oculists could hear as I do the despairing cry of men and women who were led, until the very last, to hope for a restoration of eyesight, and then told that in their particular case, all usual remedies failed. Dr Daval, an eminent French oculist, who lost his eyesight at sixty, makes an eloquent plea to his colleagues to tell their patients the truth, and, instead of treating them when they know that loss of eyesight is inevitable, advise them to study methods used by the blind, even though they may not need to use the knowledge for months or even years. There are a number of eye diseases that may be inherited, and those having such diseases should be told that they will transmit them to helpless, innocent children. The social evil is largely responsible for the infections of which ophthalmia neonatorum is only one result, but since this disease comes so often from a cause which is not generally discussed, it is particularly hard to combat. Forty per cent of existing blindness, and a vast amount of physical degeneracy, is the direct result of venereal causes. Certain forms of glaucoma may be inherited, and children whose parents have had this disease should watch their own eyes very carefully, since, if taken in time, the progress of this disease, in certain forms, may be arrested. Persons who see rings around the lights should heed the danger signal and see an oculist. Retinitis may also be inherited. I have known of three generations becoming blind from this cause.