Therefore, the clinician hasn't got an influence on the results because he/she will not decide the visual acuity on the trial end. The Clinician only has to press the button that corresponds to the answer of the patient in a 4 forced-choice task with the possibility that the patient will refer not seeing the optotype. In this case, an empty button will be pressed. What possibilities offer? The application has a fixed price with lifetime access to: 1.- The HOTV measurement protocol especially recommended for children (less than 7 years) You will have to pay (optionally) a year PRO subscription for accessing all the additional options provided by the App. Among them: 1.- Database service for following the patient progress. 2.- E-ETDRS or HOTV protocols automatically selected depending on patient’s age. When a patient automatically changes of protocol (from 6 to 7 years old) the App automatically corrects the shift due to the protocol used. 3.- Remote control using an iPhone. 4.- Personalized calibration of screen luminance and gamma correction for low contrast visual acuity testing. 5.- Low contrast, 5% and 2.5%, visual acuity testing). 6.- Follow-up plots for controlling the difference of visual acuity between eyes and detecting the reliable changes of visual acuity. 7.- Option to measure visual acuity at multiple distances even though the standard is 3 m. 8.- Export your database in a .CSV file. 9.- Assign your patients to different protocols according to different therapies you apply. 8.- Others… BEFORE DOWNLOADING ON IPHONE YOU SHOULD KNOW: The functionalities differ depending on the installation on an iPad or iPhone: 1.- You need an iPad for conducting the Visual Acuity measurement. 2.- If you install the AmblyopiaVA in an iPhone this only serves as a remote control, you will still need an iPad to measure the Visual Acuity. 3.- You can download in both iPhone or iPad just if both are using the same Apple Store account for which the App was both. 4.- You can access to more information about the procedure at: https://www.visualacuitytest.com/en/ INFORMATION ABOUT PRO SUBSCRIPTION The AmblyopiaVA is an app that requires a single lifetime payment for accessing to the HOTV protocol testing. However, if you want to access all the services you have to buy a PRO auto-subscription for 29.99€ (prices can vary between countries) for a period of 1 year. The payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. The account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. You can find our terms and privacy policy at https://www.visualacuitytest.com/en/2-documentation/25-terms-conditions SUPPORT AND QUESTIONS You can access our webpage www.visualacuitytest.com to view all the research validation papers or the authors that have used the App in their research.
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