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Related Concept Videos

Color Vision01:24

Color Vision

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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Author Spotlight: An Alternative Approach to Protein Quantification by Bradford Assay Using a Smartphone
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[Investigation of Color Vision Using Pigment Color Plates and a Tablet PC].

P Tsimpri1, J Kuchenbecker1

  • 1Augenklinik, Helios Klinikum Berlin-Buch.

Klinische Monatsblatter Fur Augenheilkunde
|May 10, 2016
PubMed
Summary
This summary is machine-generated.

Tablet PC color vision tests show roughly comparable results to traditional book formats. However, book-based testing offers better separation and validity for color plates, limiting tablet use.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Digital Health

Background:

  • Numerous ophthalmic applications, including color vision tests, exist.
  • No prior clinical trials have evaluated color vision test apps on tablet PCs.

Purpose of the Study:

  • To evaluate the clinical efficacy of a tablet PC-based color vision test.
  • To compare the performance of color vision tests presented on a tablet PC versus traditional book format.

Main Methods:

  • 19 Velhagen/Broschmann/Kuchenbecker color plates and an HMC anomaloscope were used.
  • Tests were conducted on a tablet PC (iPad2®) and compared to a book format.
  • 77 subjects (62 color normal, 15 with color vision deficiency) were examined.

Main Results:

  • Overall coincidence between book and tablet PC was 88.0%.
  • Subjects with color vision deficiency showed 83.3% coincidence, while color-normal subjects showed 89.1%.
  • Tablet PC testing resulted in more errors (5) compared to the book format (2) for distinguishing color vision deficiencies.

Conclusions:

  • Tablet PC color vision testing yields comparable, but not identical, results to book formats.
  • Traditional book presentation demonstrated superior separation and validity of color plates.
  • The validity of certain color plates is limited on tablet PCs, restricting their use.