Last edited by Kazigal
Thursday, May 7, 2020 | History

1 edition of Observations on the macula lutea found in the catalog.

Observations on the macula lutea

histology of the human macula

by G. Lindsay Johnson

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  • 25 Currently reading

Published by Knickerbocker Press in New Rochelle, N.Y .
Written in English

    Subjects:
  • Macula Lutea, anatomy & histology

  • Edition Notes

    Other titlesHistology of the human macula.
    Statementby G. Lindsay Johnson
    ContributionsTweedy, John, 1849-1924, former owner, Royal College of Surgeons of England
    The Physical Object
    Pagination2 pts. (p. 302-312, 446-459, [5] p. of plates, [1] folded plate) :
    Number of Pages459
    ID Numbers
    Open LibraryOL25867016M

    "Macula Lutea" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings).Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.   The macula or macula lutea (from Latin macula, "spot" + lutea, "yellow") is an oval-shaped highly pigmented yellow spot near the center of the retina of .

    The macula lutea is the small, yellowish central portion of the retina. It is about mm in diameter and is the area providing the clearest, most distinct vision. When one looks directly at. “Macula lutea” first appeared in an American newspaper in , describing a presentation by Albert von Kölliker and Heinrich Müller: “ the part the most sensible to light, the macula lutea ” EE We identified other uses of the two-word term “macula lutea” in American newspaper articles or advertisements between and FF, GG, HH, II, JJ, KK Gradually, the single Cited by: 1.

    Macula definition is - spot, blotch; especially: macule. Recent Examples on the Web This happens because the drug can build up in the macula and other parts of the eye, eventually causing blindness. — Camela Thompson, STAT, "Life with lupus: Trump’s hydroxychloroquine hype puts my treatment — and himself — at risk," 20 May Other carotenoids are found in our kidneys, livers skin.   The fovea is a tiny pit in the retina aligned with the central axis of the lens, whereas the macula is a larger area including and surrounding the fovea. The fovea contains about 4, tiny, closely spaced cones (no rods) and produces the highest.


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Observations on the macula lutea by G. Lindsay Johnson Download PDF EPUB FB2

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

The macula (/ˈmakjʊlə/) or macula lutea is an oval-shaped pigmented area near the center of the retina of the human eye and some other animalian macula in humans has a diameter of around mm ( in) and is subdivided into the umbo, foveola, foveal avascular zone, fovea, parafovea, and perifovea areas.

The anatomical macula at mm ( in) is much larger than the clinical MeSH: D   Observations on the Observations on the macula lutea book lutea: histology of the human macula by Johnson, G. Lindsay (George Lindsay), ; Tweedy, John,former owner ; Royal College of Surgeons of EnglandPages: Macula lutea, in anatomy, the small yellowish area of the retina near the optic disk that provides central vision.

When the gaze is fixed on any object, the centre of the macula, the centre of the lens, and the object are in a straight the centre of the macula is a depression, called the fovea, which contains specialized nerve cells that are exclusively of the type known as cones.

The macula is the most sensitive spot in the center of the retina, which is the light-sensitive tissue that lines the inside of the back of the eye.

Also called the macula lutea, this small (less than a quarter inch in diameter) spot is responsible for our central vision and color vision. “The. Macula lutea definition is - macula. macula See the full definition.

SINCE GAMES; BROWSE THESAURUS; WORD OF THE DAY; WORDS AT PLAY. LOG IN; REGISTER; settings. What made you want to look up macula lutea. Please tell us where you read or heard it (including the quote, if possible). Show Comments Hide Comments.

WORD OF THE DAY. The macula is an oval-shaped area near the center of the retina. The retina is a light-sensitive layer that lines the back of the eye. It is made up of. ‘The macula lutea or ‘yellow spot’ in the retina is responsible for central vision and visual acuity.’ ‘When we gaze directly at an object, we hold our eyes in such a position that the image of the object falls on the central, specialized region of the retina - the fovea or macula.

Frequencies of “Macula” and “Macula Lutea” The ophthalmoscope was first presented by Hermann von Helmholtz in 3 The Google n-gram database shows that the term “macula lutea” seldom appeared in English language books prior to that time. The two-word term increased in frequency until aboutthen became less commonly used in the twentieth century, as it was shortened to.

The macula or macula lutea is the central part of the retina, which is the light-processing layer of the back of the examination, the macula is a yellowish gray area with a bright yellow reflex in the very center, representing the most sensitive area for vision, the sible for acute visual discrimination, the macula contains the highest percentage of cone cells, which are.

macula lutea A yellowish depression on the retina which contains the fovea centralis, the area of sharpest vision. macula lutea The yellow spot in the centre of the RETINA on which the image of the point of greatest visual interest falls when something is observed. The macula is the most sensitive part of the retina and is devoid of blood vessels.

Macula definition: a small spot or area of distinct colour, esp the macula lutea | Meaning, pronunciation, translations and examples. This file is licensed under the Creative Commons Attribution-Share Alike International license.: You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

You may do so in any reasonable manner, but. Macula lutea definition, macula(def 2b). See more. Quantum Health Macula 30+ Softgels, Eye Supplement, Macular Health - Lutein, Zeaxanthin, Vitamin C and E, Omega 3, Zinc - 60 Count out of 5 stars $ $ 71 ($/Count) $ $ When an eye is looking directly at an object, light rays from that object are focused on the macula lutea.

This is a yellow oval spot at the center of the retina (back of the eye). It is the part of the retina that is responsible for sharp, detailed central vision (also called visual acuity).

The macula is an anatomic specialization of the neural retina that is unique to humans and to higher primates (Fig. 1).It is defined histologically by the presence of multiple layers of retinal ganglion cells (there is only a single layer of ganglion cells in the extramacular retina), and ophthalmoscopically as the region extending from the temporal margin of the optic nerve head to the center.

The macula, macula lutea, is the small, yellowish central portion of the retina of the human eye. The macula is the most active part of the eye and processes the light signals that allow us to do fine work. It is responsible for sharp, clear central vision and the ability to perceive color. The Function of the Macula.

Description. The macula or macula lutea (from Latin macula, "spot" + lutea, "yellow") is an oval-shaped highly pigmented yellow spot near the center of the retina. It has a diameter of around 6 mm and is often histologically defined as having two or more layers of ganglion cells.

Near its center is the fovea centralis, a small pit that contains the largest concentration of cone cells in the. The macula is a small component of the eye that helps the organ to perceive visual details clearly. Oval in shape and somewhat yellowish in color, the eye macula is found near the middle area of the some type of damage occurs to this yellow area, the result is a decrease in the quality of central vision, often referred to as macular degeneration.

The Macula of the Human Eye. Ma The macula, macula lutea, is the small, yellowish central portion of the retina of the human eye. The macula is the most active part of the eye and processes the light signals that allow us to do fine work.

It is responsible for sharp, clear central vision and the ability to perceive color.The macula is the functional center of the retina. It gives us the ability to see “20/20” and provides the best color vision.

The macula is small measuring about 5 mm in diameter. Central Macula Called Fovea. In the very center of the macular region is the fovea.Macula lutea definition: a small yellowish oval-shaped spot, rich in cones, near the centre of the retina of the | Meaning, pronunciation, translations and examples.