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LcsChart 1.0.1
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File Size: 1.5 Mb

LcsChart 1.0.1

Publisher:By Nasanen
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Publisher's Description:

LcsChart - LcsChart is a very fast and easy to use contrast sensitivity test. Contrast sensitivity refers to the ability to see small contrasts, i.e. small differences in brightness. A person who has high contrast sensitivity is able to perceive smaller contrast objects than a person who's contrast sensitivity is low. Good contrast sensitivity is particularly important in difficult viewing conditions, which can reduce the contrast of the scene viewed. One may encounter such viewing conditions when driving in dense fog or heavy rain, for example. Contrast sensitivity is one of the main factors of visual function. Contrast sensitivity can be low even if visual acuity, the ability to see small details, is good. Contrast sensitivity naturally varies among individuals. The (tentative) lower limit of normal logarithmic contrast sensitivity in this test is about 1.8. The app automatically produces contrast charts as shown in the screenshot. The number of possible letter sequences is huge. In a chart, the contrast of the letters decreases so that the last letters have so small contrasts that they are extremely difficult or impossible to identify. The task of the observer is to say or think what the letter is and then tap it. A dialog box then appears indicating the correct letter, and the contrast sensitivity value. In an extremely fast and simple procedure the observer indicates the last letter she/he is able to identify. A more sophisticated and a bit longer lasting procedure will give more accurate and reliable results (see the developer’s web page).

List of Changes:

Version 1.0.1 from 2011-12-19


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File Size: 1.5 Mb

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File Size: 1.5 Mb