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Biomedical subjects

R G Frey

Publications and source records attributed to R G Frey.

At least 19 recordsLinked to original sources
PubMed1999

Hume on suicide.

Anyone interested in the morality of suicide reads David Hume's essay on the subject even today. There are numerous reasons for this, but the central one is that it sets up the starting point for contemporary debate about the morality of suicide, namely, the debate about whether some condition of life could present one with a morally acceptable reason for autonomously deciding to end one's life. We shall only be able to have this debate if we think that at least some acts of suicide can be moral, and we shall only be able to think this if we give up the blanket condemnation of suicide that theology has put in place. I look at this strategy of argument in the context of the wider eighteenth-century attempt to develop a non-theologically based ethic. The result in Hume's case is a very modern tract on suicide, with voluntariness and autonomy to the fore and with reflection on the condition of one's life and one's desire to carry on living a life in that condition the motivating circumstance.

Christianity↗
PubMed1997

Moral community and animal research in medicine.

The invocation of moral rights in moral/social debate today is a recipe for deadlock in our consideration of substantive issues. How we treat animals and humans in part should derive from the value of their lives, which is a function of the quality of their lives, which in turn is a function of the richness of their lives. Consistency in argument requires that humans with a low quality of life should be chosen as experimental subjects over animals with a higher quality of life.

Anencephaly↗
PubMed1983

[Light reflexes of the fundus oculi. Paper on an atlas which appeared under this title in Russian by A.M. Vodovozov].

This atlas is the first publication dealing with the clinical significance of the light reflexes of the fundus. The mechanism and the conditions for the occurrence of light reflexes in ophthalmoscopy are described. A classification of the light reflexes is presented, dividing them into normal and pathologic groups. The normal light reflexes - foveolar, macular, areal, paravasal, streaks of light on the vessels - and their abnormal variations in different diseases of the fundus are described. The pathologic light reflexes - fanlike, focal, peripapillary, linear, stationary, metallic, crystalline - and their diagnostic significance are discussed. Practical recommendations are given for assessing pathologic changes in the retina and the optic disk from the appearance of the light reflexes. Finally the manifestation of light reflexes as a characteristic of some diseases of the fundus is pointed out.

Fundus Oculi↗
PubMed1981

[Mathematical reflections on the use of the cross-cylinder (author's transl)].

The optical effect of the cross-cylinder in checking the position of the axis of a correcting cylinder-lens is based on the laws of obliquely crossed cylinders. The corresponding formulae are specified, since relevant calculations are more precise than graphic diagrams, especially for comparisons in tabular form. Some examples are given.

Eyeglasses↗
PubMed1977

[The eye and traffic].

Explore the source record for details and available documents.

Automobile Driver Examination↗
PubMed1975

[Dark adaptation in achromats (mathematical analysis) (author's transl)].

The integral dark adaptation curves of 10 complete acromats, 4 incomplete achromats and 11 normal subjects were compared using regression analysis. Neither in achromats nor in normal subjects a kink could be proven by this method. The final threshold of the mean dark adaptation curve of the complete achromats is slightly elevated. This may be explained by the fact that the group comprised 6 children.

Color Vision Defects↗
PubMed1975

[Tritanopia and dominantly inherited optic atrophy (author's transl)].

The clinical picture of hereditary dominant optic atrophy is described and the particular importance of the concomitant tritan dyschromatopsia is stressed. Most cases of tritanopia are acquired, congenital ones are rare. Wright has studied 17 tritanopes - the greatest series ever reported. A full analysis of colour vision is given, but no detailed information about other visual functions and the condition of the fundi. As single members of families affected by cominantly inherited optic atrophy show typical tritanopia, a visual acuity of 6/8 and hardly any pallor of their disks, it is possible that such isolated cases are regarded wrongly as congenital tritanopes.

Adolescent↗