Color Fundus Photography
Color Fundus Photography - Related Videos
05:51
Smartphone Fundus Photography
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Cited by 49 •
2017
Fundus photography normally requires specialized fundus cameras that are not always available in all clinical settings. Here, a simple method to record ocular fundus images using a smartphone camera and a conventional high-plus handheld indirect ophthalmoscopy lens is described.
07:22
Quantitative Fundus Autofluorescence for the Evaluation of Retinal Diseases
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Cited by 22 •
2016
The retinal pigment epithelium (RPE) supports the sensory retina through recycling visual cycle byproducts, which accumulate as lipofuscin. These products are autofluorescent and can be qualitatively imaged in vivo. Here, we describe a method to quantitatively image RPE lipofuscin using confocal scanning laser ophthalmoscopy.
10:11
Fundus Photography as a Convenient Tool to Study Microvascular Responses to Cardiovascular Disease Risk Factors in Epidemiological Studies
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Cited by 45 •
2014
Retinal image analysis is an unobtrusive procedure for visualizing the microcirculation. The impact of cardiovascular disease risk factors can result in changes of retinal vessel calibers. The procedures to acquire fundus images and the steps for calculating the vessel calibers are described.
09:20
Color Afterimages
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Human color vision is impressive. People with normal color vision can tell apart millions of individual hues. Most amazingly, this ability is achieved with fairly simple hardware. Part of the power of human color vision comes from a clever bit of engineering in the human brain. There, color perception relies on what is known as an 'opponent system.' This means that the presence of one kind of stimulus is treated as evidence for...
03:02
Colors and Magnetism
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2020
Color in Coordination Complexes When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
FAQs
The camera directs illumination through the pupil toward the back of the eye, then records light reflected from the retina, optic disc, macula, and retinal blood vessels. This arrangement allows those structures to appear together in a color photograph without requiring invasive access. The resulting image provides a consistent visual record for examination and later comparison.
Standardized photographs make observations more consistent across examinations. When images are produced in a comparable format, researchers and clinicians can examine changes in retinal or optic-nerve appearance over time rather than relying only on separate, subjective descriptions. This supports documentation of disease progression and helps evaluate whether visible findings change following treatment.
The optic disc and retina are especially relevant because they contain neural tissue that can be examined visually, while retinal blood vessels provide information about vascular features. The macula is also recorded as part of the posterior eye. Together, these structures allow ocular findings to be considered alongside broader neurological and neurovascular conditions.
Its value in neuroscience comes from connecting visible ocular findings with the health of the nervous system. Images can document changes affecting the optic nerve and retina in association with neurological or neurovascular disorders. This creates a photographic record that researchers can use when relating eye-based observations to broader nervous-system changes.
A fundus camera is positioned to illuminate the back of the eye through the pupil and capture the reflected light as a color image. The photograph records the retina, optic disc, macula, and retinal vessels in a single visual record. Because the images are standardized, the same approach can support examination and comparison across time.
Researchers can use repeated photographs when they need to document progression or evaluate treatment responses. The method's noninvasive nature, accessibility, and repeatability support serial observation without relying on a single time point. In neuroscience research, these longitudinal images can help relate changing ocular findings to the course of neurological or neurovascular disease.
The photographs provide visual evidence of the appearance of retinal and optic-nerve structures at particular examination points. Comparing standardized images can reveal whether documented findings remain stable or change as disease progresses or treatment is given. This makes the technique useful for creating records that support monitoring, rather than serving only as an initial examination.
The retina and optic nerve offer visible neural structures that can be recorded alongside retinal blood vessels and other posterior-eye features. In a neuroscience context, these images help researchers examine whether ocular changes correspond with neurological or neurovascular disorders. That connection supports studies linking accessible eye-based observations with broader nervous-system health.