![]() The MAC-O-SCOPE is a stereoscope newly developed by Josef Thiel for performing vision tests and / or vision therapy. MAC-O-SCOPE A newly developed stereoscope ![]() The turntable can rotate clockwise or counterclockwise. Infinitely variable settings for comfortable head and body posture. Mini bearings provide for finest adjustment of the running speed of the turntable. Best performance thanks to high-quality acrylic and plastic, precisely milled to the 1/100mm. Precision and variability are the main features of the macBrush Vĭue to a precise adjustment of the Polaroid disc and the cobalt filter, the new mac Brush V achieves an even clearer visibility of the brush / propeller. Josef Thiel developed the macBrush V and it is available here on this homepage. ![]() The macBrush V is used in functional optometry as a testing and training device. ![]() Stokes found that the tuft is best perceived when the degree of polarization is at least 60% and that light is cobalt blue. When viewed through a cobalt filter, the phenomenon is most easily perceived. To create a Haidinger Brush in the fovea, a rotating polarized disc is required. Using optometric techniques, the fixation location (directional value for strait forward) can be moved into the fovea centralis with the macBrush. Through this biofeedback the person sees for himself that he is eccentrically fixating. If the Haidinger Brush is produced in case of amblyopia with eccentric fixation, then the small propeller is not located at the position that the person fixates with his amblyopic eye. The Haidinger Tuft is perceived as a small propeller-like rotating structure. The Haidinger Brush is an entoptic phenomenon which is generated in the fovea centralis by the macBrush V, regardless of whether the fovea centralis is used in normal vision or not. The macBrush V is a high-quality and technically advanced instrument of functional optometry for the generation of the Haidinger Brush. Here you will find options to view and activate subscriptions, manage institutional settings and access options, access usage statistics, and more.MacBrush V The Haidinger Brush in a new dimension If you believe you should have access to that content, please contact your librarian.įor librarians and administrators, your personal account also provides access to institutional account management. The institutional subscription may not cover the content that you are trying to access. Oxford Academic is home to a wide variety of products. View the institutional accounts that are providing access.View your signed in personal account and access account management features.Some societies use Oxford Academic personal accounts to provide access to their members.Ĭlick the account icon in the top right to: See below.Ī personal account can be used to get email alerts, save searches, purchase content, and activate subscriptions. Some societies use Oxford Academic personal accounts to provide access to their members. If you do not have a society account or have forgotten your username or password, please contact your society. Do not use an Oxford Academic personal account. When on the society site, please use the credentials provided by that society.If you see ‘Sign in through society site’ in the sign in pane within a journal: Many societies offer single sign-on between the society website and Oxford Academic. Society member access to a journal is achieved in one of the following ways: If you cannot sign in, please contact your librarian. If your institution is not listed or you cannot sign in to your institution’s website, please contact your librarian or administrator.Įnter your library card number to sign in. Following successful sign in, you will be returned to Oxford Academic.When on the institution site, please use the credentials provided by your institution.Select your institution from the list provided, which will take you to your institution's website to sign in.Click Sign in through your institution.Shibboleth / Open Athens technology is used to provide single sign-on between your institution’s website and Oxford Academic. This authentication occurs automatically, and it is not possible to sign out of an IP authenticated account.Ĭhoose this option to get remote access when outside your institution. Typically, access is provided across an institutional network to a range of IP addresses. If you are a member of an institution with an active account, you may be able to access content in one of the following ways: Get help with access Institutional accessĪccess to content on Oxford Academic is often provided through institutional subscriptions and purchases.
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