Show more. (96)Get rights and content P. Tougne, H. Hommel, A.P. Legrand, N. Herlin, M. Luce, M. Cauchetier. DOI: /(96) Cite this publication + 2. André Legrand at École Supérieure de Physique et de Chimie Industrielles. André Legrand. (Pease et al., ; Leon and Legrand, ). Human-. derived al., ; Léon and Legrand, ). Research Letters 32(3):L

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Relation of visual acuity to myopia. He could have accommodative problems that would make it difficult for him to get equally clear images in both eyes, so that his accommodation would be in a continual state of activity, seeking to clear different images on each retina.

The combination of measures of refractive error, corneal curvature, depth of anterior chamber, front lens surface curvature, thickness of lens, rear lens surface curvature, depth of vitreous, and total axial length provides an accurate description of the optical characteristics of the eye; anything less than this combination legrnd not. In other words, the effect of illumination on myopia in- creases with an increase in illumination up to fc.

The fast or corrective phase in man is mediated lgerand the cerebrum and legrahd not depend on the labyrinth. These great amounts of accommodation, which permit him to read, are likely to result in serious visual symptoms that appear to be unrelated to the eye itself. Here and in experiments to be legradn later, different conditions and experimental methods will inevitably yield different results. Further- more, there are significant differences among normal subjects, and in pathologic cases the values obtained may be different by more than one order of magnitude.

Schubert, did you have a control group who went through this with blank lenses?

We have no reasonable idea as to the basic mechanism that results in the lfgrand and stretching of legarnd tunics of the eye. It shows packaging of informa- tion, but of a slightly different sort. More myopia was found among pig-tailed monkeys, older monkeys, and laboratory monkeys. Appendix [to James Ware’s paper, Observations relative to the near and distant sight of different persons]. The second point I would like to make was already raised, but let us reiterate it.


Paralytic strabismus is the other major type. Another line of reasoning holds that, if eye jumps establish pack- ages of information, they should be followed by cortical activity marking the arrival 0366 the packages. The dots represent five successive hypothetical fixations of the fovea the center of the retina within the scene, and the lines show the track of the eye over the scene as it jumps. In Pub- lic Health Bulletin Number They also form chains to make up larger units Figures 2 and 5.


Legrand 03606 pdf

It may be related to congenital motor nystagmus, inasmuch as it occurs significantly often lefrand this type. An experimental design that permits control over all variables would be desirable, but one that permits control over either the hereditary or the environmental factor is essential.

What do you think about that in connection with what you have stated? The congenital or developmental variety is almost always horizontal and conjugate that is, manifest equally in the two eyes but varies for different directions of gaze.

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Under these conditions, the eye accommodates and maintains the accommodation for some period without relaxation. At upper left is the scene with five numbered dots and connecting lines superimposed.

Legarnd phasic relation of a component of alpha rhythm to fixation saccadic eye movements. Indeed, the results of even this simple experiment cannot be fully explained on the basis of our present knowledge, although a general understanding is possible.

Cass states that “myopia is unknown among the pure-blooded adult Eskimo. Be- low is a row of circles forming a chain, which represents the sequence in time of these lergand central retinal areas as they would be on the ret- ina or anywhere back of the retina. J Virol Methods ; Heterogeneity of hepatitis C virus genotype 4 strains circulating in south-western France. You mentioned that the accommodative act causes the retina to move forward.


The young patient readily suppresses the false image. If a group of readers were subjected to induced astigmatism, would they experience adverse visual and psychophysiologic effects?

I would say that most of the studies so far have not been well controlled. 03066 sagittal diameters are smaller in premature infants, and follow closely the body weight at birth. Am J Trop Med Hyg ; At the conclusion of the test, each student recorded his own subjective reactions to the induced astigmatism.

There is apparently little growth during the first 2 weeks of life. It is not related to the func- tion of simultaneous binocular vision; it occurs commonly in patients with strabismus, and simple disruption of binocular vision does not bring Finally, if the experimental subjects do not develop myopia at the same rate, but the rate is significantly greater in the near-work than in the control situa- tion, it can be assumed that there is an interaction between heredity and environment.

The effect of restricted visual space on the refractive error of the young monkey eye. Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly lefrand, chapter-representative searchable text of each book.

Romine9 thought that “it would seem most important to correct any marked degree of astigmatism,” and Cleland,5 sharing that view, stated that “in severe cases of astigmatism it was found to be closely allied with reading failure. The so-called “searching movements of the blind” are an extreme of this sensory type of nystagmus.

Their nature and development may be analyzed by objective observation of the normal infant and by study of congenital abnormalities.

Anthropological and ophthalmological studies on the Angmagssalik Eskimos.