Zobrazeno 1 - 10
of 67
pro vyhledávání: '"J G, Sivak"'
Autor:
J. G. Sivak
Publikováno v:
Clinical and Experimental Optometry. 95:572-582
In spite of a long history of study, as well as a significant, recent increase in research attention, the cause(s) and the means of preventing or mitigating the progression of myopia in children are still elusive. The high and growing prevalence of m
Publikováno v:
The Open Toxicology Journal. 4:13-20
Publikováno v:
Photochemistry and Photobiology. 76:361-367
Autor:
J. G. Sivak, M. E. Andison
Publikováno v:
Canadian Journal of Zoology. 72:1880-1886
Visual teleost species such as the oscar, Astronotus ocellatus, accommodate by moving the lens within the eye. This movement is controlled by a smooth muscle, the retractor lentis. We observed two components in the accommodative lens movement: a naso
Publikováno v:
Experimental Eye Research. 59:521-535
We have quantified the influence of lens sutural anatomy on optical quality (focal length variability, i.e. spherical aberration) in adult monkeys (Macaque nemestrina). Adult lenses (n = 6) were initially scanned by a low-power helium-neon laser beam
Publikováno v:
Canadian Journal of Zoology. 72:689-701
Embryological studies of the teleost lens have attracted little attention. The morphology of the rainbow trout (Oncorhynchus mykiss) lens during embryonic development was investigated using light microscopy. Results indicate that in general, the embr
Publikováno v:
Ophthalmic and Physiological Optics. 12:448-456
We have developed a lightweight plastic goggle with rigid contact lens inserts that can be applied to the eyes of newly hatched chicks to explore the range and accuracy of the developmental mechanism that responds to retinal defocus. Convex and conca
Autor:
J. G. Sivak
Publikováno v:
Canadian Journal of Zoology. 69:2501-2506
The shape and focal properties (spherical aberration) of lenses from the eyes of three cephalopod species, the cuttlefish Rosia pacifica, the squid Loligo opalescens, and the octopus Octopus dofleini, were measured and compared with descriptions of t
Autor:
J. G. Sivak, Wei Shen
Publikováno v:
Investigative ophthalmologyvisual science. 48(10)
Purpose Recently, it has been found that form deprivation myopia can be induced in fish (tilapia). This study examined the sensitivity of the tilapia eye to positive and negative lenses. It further investigated the sensitivity of the fish eye to form
Autor:
J. G. Sivak, Vivian Choh
Publikováno v:
Journal of vision. 5(3)
Our goal was to determine whether experimentally induced ametropias have an effect on lenticular accommodation and spherical aberration. Form-deprivation myopia and hyperopia were induced in one eye of hatchling chicks by application of a translucent