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Phase Contrast and Differential Interference Contrast Microscopy

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...

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In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.

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Selection of color vision tests for the Army Air Forces; a summary of studies made at the Army Air Forces School of Aviation Medicine.

Archives of ophthalmology (Chicago, Ill. : 1929)·2010

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Two criteria for the selection of color vision test plates.

Journal of the Optical Society of America·2010

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An improved screening test for red-green color deficiency composed of available pseudo-isochromatic plates.

Journal of the Optical Society of America·2010

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A case of atypical achromatopsia.

American journal of ophthalmology·2010

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Peripheral visual acuity with special reference to scotopic illumination.

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Rate of dark adaptation and regional threshold gradient of the dark-adapted eye; physiologic and clinical studies.

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Related Experiment Video

Updated: Jun 15, 2026

State-Dependency Effects on TMS: A Look at Motive Phosphene Behavior

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Visual effects of tridione

L L SLOAN, A P GILGER

American Journal of Ophthalmology

|March 19, 2010

Summary

No abstract available in PubMed .

Keywords:

TRIDIONE/visual effect

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