Biomaterial Database

Development alterations in binocular competitive interactions and visual acuity in visually deprived cats. 1981

D C Smith

The purpose of the present study was to determine the effects of developmental alterations in binocular competitive interactions between the eyes on visual acuity. Comparisons were made between animals which were monocularly deprived (MD) of patterned visual input, binocularly lid-sutured cats (BD), and animals which had the lids of one eye sutured closed and the other eye removed prior to natural eye opening (MDE). Thus, each group differed in the degree of competitive imbalance between the eyes during postnatal development. Threshold visual acuity for high contrast, squarewave gratings was measured in a jumping stand. Mean visual acuities for each group using a single deprived eye were: group MD, 0.65 cycles/deg; group BD, 3.2 cycles/deg; group MED, 3.72 cycles/deg. These results indicated that the greater the competitive disadvantage an eye is placed at during development, the greater the acuity (sensory) deficits. Further, comparisons made between MD and MDE animals indicated that the acuity deficits using effects of deprivation per se.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
D004594	Electrophysiology	The study of the generation and behavior of electrical charges in living organisms particularly the nervous system and the effects of electricity on living organisms.
D005260	Female		Females
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012683	Sensory Deprivation	The absence or restriction of the usual external sensory stimuli to which the individual responds.	Deprivation, Sensory,Deprivations, Sensory,Sensory Deprivations
D012684	Sensory Thresholds	The minimum amount of stimulus energy necessary to elicit a sensory response.	Sensory Threshold,Threshold, Sensory,Thresholds, Sensory
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor
D014785	Vision, Ocular	The process in which light signals are transformed by the PHOTORECEPTOR CELLS into electrical signals which can then be transmitted to the brain.	Vision,Light Signal Transduction, Visual,Ocular Vision,Visual Light Signal Transduction,Visual Phototransduction,Visual Transduction,Phototransduction, Visual,Transduction, Visual
D014792	Visual Acuity	Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.	Acuities, Visual,Acuity, Visual,Visual Acuities