For testing vision it is mandatory to switch off auto-brightness in order to maintain the background luminance constant for any environmental light used. The screen brightness can change if you put an App in second plane or if you put the iPad in the sleep mode. This can result in testing vision in...
Written by Rodríguez-Vallejo M on . Posted in 1.- First steps.
Indepently you measure Far, Intermediate or Near vision the ETDRS procedure is the same:
Read only one letter per row. For instance, first letter starting from the left or from the right and go down after each correct answer
After the first failure, go to the previous line and ask for reading...
Written by Rodríguez-Vallejo M on . Posted in 1.- First steps.
Select the presentation distance in the FAR picker -> Press Go below Far-> Confirm
To measure far distance visual acuity you have first to select the distance in the FAR picker view, then put the iPad at the selected distance from the eyes and start to measure with the ETDRS. A confirmation...
Written by Rodríguez-Vallejo M on . Posted in 1.- First steps.
Select the presentation distance in the INTERMEDIATE picker -> Press Go below Intermediate -> Confirm
To measure intermediate visual acuity you have first to select the distance in the INTERMEDIATE picker view, then put the iPad at the selected distance from the eyes and start to measure with...
Written by Rodríguez-Vallejo M on . Posted in 1.- First steps.
Select the presentation distance in the NEAR picker -> Press Go below Near -> Confirm
To measure near visual acuity you have first to select the distance in the NEAR picker view, then put the iPad at the selected distance from the eyes and start to measure with the ETDRS. A confirmation message...
Written by Rodríguez-Vallejo M on . Posted in 1.- First steps.
Select RE, LE or BE -> Press Go on the desired distance -> Confirm
The App comes with a different set of letters in order to avoid memorization. Therefore either letters for distance, intermediate and near or right, left and both eyes differ to prevent memorization