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Static retinoscopy is performed when the patient has relaxed accommodative status. This can be obtained by the patient viewing a distance target or by the use of cycloplegic drugs (where, for example, a child's lack of reliable fixation of the target can lead to fluctuations in accommodation and thus the results obtained). Dynamic retinoscopy ...
For example, in the second visual area , the map is divided along an imaginary horizontal line across the visual field, in such a way that the parts of the retina that respond to the upper half of the visual field are represented in cortical tissue that is separated from those parts that respond to the lower half of the visual field.
Some notable examples include: In the movie Star Trek II: The Wrath of Khan (1982), Admiral Kirk gains access to top secret computer files by use of a retinal scan. In the science fiction novel The Long Result by John Brunner (1965), a retinal scanner is used to access a Remote Control Centre at a spaceport.
Ahead, you’ll find pictures of common skin rashes, plus symptoms to look out for. It’s important to note that rashes can look different depending on your skin tone. Some conditions might not ...
A significant challenge when trying to image the eye is patient movement and saccadic movement of the eye. Movement introduces a lot of noise into the signal making tiny vessels impossible to distinguish. One approach to decreasing the influence of movement on signal detection is to shorten the scanning time.
Alfred Blaschko, a private practice dermatologist from Berlin, first described and drew the patterns of the lines of Blaschko in 1901. He obtained his data by studying over 140 patients with various nevoid and acquired skin diseases and transposed the visible patterns the diseases followed onto dolls and statues, then compiled the patterns onto a composite schematic of the human body.
We will solicit skin disease pictures from Cochrane Skin consumers globally for addition to Cochrane Skin Systematic Reviews in the Cochrane Library and Wikipedia via the social media outreach. Pictures will need to be of acceptable quality as judged by our medical and technical experts and come with:
Digital dermatoscopy (videodermatoscopy) is used for monitoring skin lesions suspicious of melanoma. Digital dermatoscopy images are stored and compared to images obtained during the patient's next visit. Suspicious changes in such a lesion are an indication for excision. Skin lesions, which appear unchanged over time are considered benign.